Non-finite forms
Infinitivo and Gerundio
| Form | Spanish | Use |
|---|---|---|
| Infinitivo | robustecer | Dictionary form and base form for many compound structures. |
| Gerundio | robusteciendo | Used with estar for progressive forms, for example estar robusteciendo. |
Spanish verb conjugation
Robustecer conjugation
robustecer is an irregular Spanish -ER verb meaning strengthen. In the present tense: yo robustezco, tú robusteces, él/ella robustece, nosotros robustecemos, vosotros robustecéis, ellos robustecen. Full conjugation across 18 tenses below.
Rank #2052-ERIrregular18 tense tables
At a glance
- Infinitive
- robustecer
- Gerundio
- robusteciendo
- Meaning
- strengthen
- Pattern
- Irregular
- Difficulty
- Level 2
Conjugation tables
Study tense
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Robustecer across the MuyVerbs tense system
Study present continuous
Presente
Present
| Pronoun | Form | Context |
|---|---|---|
| yo | robustezco | Yo robustezco la espalda con estiramientos cortos.I strengthen my back with short stretches. |
| tú | robusteces | Normalmente, tú robusteces las piernas con subidas suaves.You usually strengthen your legs with gentle uphill walks. |
| él | robustece | Hoy, la nueva rutina robustece las rodillas semana a semana.Today, the new routine strengthens the knees week by week. |
| nosotros | robustecemos | A veces, nosotros robustecemos el grupo con reglas claras.At times, we strengthen the group with clear rules. |
| vosotros | robustecéis | Ahora, vosotros robustecéis los hombros con bandas elásticas.Right now, you all strengthen your shoulders with resistance bands. |
| ellos | robustecen | Casi siempre, los ejercicios del fisio robustecen el tronco poco a poco.Most of the time, the therapist's exercises strengthen the core little by little. |
Pretérito Perfecto
Present Perfect
| Pronoun | Form | Context |
|---|---|---|
| yo | he robustecido | Este año, yo he robustecido la espalda con estiramientos cortos.This year, I have strengthened my back with short stretches. |
| tú | has robustecido | Últimamente, tú has robustecido las piernas con subidas suaves.Lately, you have strengthened your legs with gentle uphill walks. |
| él | ha robustecido | En estos meses, la nueva rutina ha robustecido las rodillas semana a semana.In these months, the new routine has strengthened the knees week by week. |
| nosotros | hemos robustecido | Hasta ahora, nosotros hemos robustecido el grupo con reglas claras.So far, we have strengthened the group with clear rules. |
| vosotros | habéis robustecido | En lo que va de curso, vosotros habéis robustecido los hombros con bandas elásticas.This term, you all have strengthened your shoulders with resistance bands. |
| ellos | han robustecido | En este tiempo, los ejercicios del fisio han robustecido el tronco poco a poco.During this time, the therapist's exercises have strengthened the core little by little. |
Pretérito Indefinido
Preterite
| Pronoun | Form | Context |
|---|---|---|
| yo | robustecí | Ayer, yo robustecí la espalda con estiramientos cortos.Yesterday, I strengthened my back with short stretches. |
| tú | robusteciste | Hace un rato, tú robusteciste las piernas con subidas suaves.A little while ago, you strengthened your legs with gentle uphill walks. |
| él | robusteció | Esta mañana, la nueva rutina robusteció las rodillas semana a semana.This morning, the new routine strengthened the knees week by week. |
| nosotros | robustecimos | Anoche, nosotros robustecimos el grupo con reglas claras.Last night, we strengthened the group with clear rules. |
| vosotros | robustecisteis | El sábado, vosotros robustecisteis los hombros con bandas elásticas.On Saturday, you all strengthened your shoulders with resistance bands. |
| ellos | robustecieron | Hace poco, los ejercicios del fisio robustecieron el tronco poco a poco.Not long ago, the therapist's exercises strengthened the core little by little. |
Pretérito Imperfecto
Imperfect
| Pronoun | Form | Context |
|---|---|---|
| yo | robustecía | Antes, yo robustecía la espalda con estiramientos cortos.Before, I used to strengthen my back with short stretches. |
| tú | robustecías | Por entonces, tú robustecías las piernas con subidas suaves.Back then, you used to strengthen your legs with gentle uphill walks. |
| él | robustecía | En esa época, la nueva rutina robustecía las rodillas semana a semana.At that time, the new routine used to strengthen the knees week by week. |
| nosotros | robustecíamos | Cuando eso era normal, nosotros robustecíamos el grupo con reglas claras.When that was normal, we used to strengthen the group with clear rules. |
| vosotros | robustecíais | Hace años, vosotros robustecíais los hombros con bandas elásticas.Years ago, you all used to strengthen your shoulders with resistance bands. |
| ellos | robustecían | En aquellos días, los ejercicios del fisio robustecían el tronco poco a poco.In those days, the therapist's exercises used to strengthen the core little by little. |
Pretérito Pluscuamperfecto
Past Perfect
| Pronoun | Form | Context |
|---|---|---|
| yo | había robustecido | Cuando llegaste, yo ya había robustecido la espalda con estiramientos cortos.When you arrived, I had already strengthened my back with short stretches. |
| tú | habías robustecido | Para entonces, tú ya habías robustecido las piernas con subidas suaves.By then, you had already strengthened your legs with gentle uphill walks. |
| él | había robustecido | Al volver, la nueva rutina ya había robustecido las rodillas semana a semana.When we came back, the new routine had already strengthened the knees week by week. |
| nosotros | habíamos robustecido | Antes de hablarlo, nosotros ya habíamos robustecido el grupo con reglas claras.Before talking it through, we had already strengthened the group with clear rules. |
| vosotros | habíais robustecido | Cuando mirasteis otra vez, vosotros ya habíais robustecido los hombros con bandas elásticas.When you looked again, you all had already strengthened your shoulders with resistance bands. |
| ellos | habían robustecido | Para ese momento, los ejercicios del fisio ya habían robustecido el tronco poco a poco.By that moment, the therapist's exercises had already strengthened the core little by little. |
Pretérito Anterior
Preterite Anterior
| Pronoun | Form | Context |
|---|---|---|
| yo | hube robustecido | Apenas yo hube robustecido la espalda con estiramientos cortos, todo cambió.As soon as I had strengthened my back with short stretches, everything changed. |
| tú | hubiste robustecido | En cuanto tú hubiste robustecido las piernas con subidas suaves, se notó.The moment you had strengthened your legs with gentle uphill walks, it showed. |
| él | hubo robustecido | No bien la nueva rutina hubo robustecido las rodillas semana a semana, hubo ruido.As soon as the new routine had strengthened the knees week by week, there was trouble. |
| nosotros | hubimos robustecido | Tan pronto como nosotros hubimos robustecido el grupo con reglas claras, seguimos adelante.Once we had strengthened the group with clear rules, we moved on. |
| vosotros | hubisteis robustecido | Apenas vosotros hubisteis robustecido los hombros con bandas elásticas, mirasteis el resultado.As soon as you all had strengthened your shoulders with resistance bands, you checked the result. |
| ellos | hubieron robustecido | En cuanto los ejercicios del fisio hubieron robustecido el tronco poco a poco, el ambiente cambió.The moment the therapist's exercises had strengthened the core little by little, the mood changed. |
Futuro
Future
| Pronoun | Form | Context |
|---|---|---|
| yo | robusteceré | Mañana, yo robusteceré la espalda con estiramientos cortos.Tomorrow, I will strengthen my back with short stretches. |
| tú | robustecerás | Dentro de poco, tú robustecerás las piernas con subidas suaves.Soon, you will strengthen your legs with gentle uphill walks. |
| él | robustecerá | Esta tarde, la nueva rutina robustecerá las rodillas semana a semana.This afternoon, the new routine will strengthen the knees week by week. |
| nosotros | robusteceremos | La semana que viene, nosotros robusteceremos el grupo con reglas claras.Next week, we will strengthen the group with clear rules. |
| vosotros | robusteceréis | Pronto, vosotros robusteceréis los hombros con bandas elásticas.Before long, you all will strengthen your shoulders with resistance bands. |
| ellos | robustecerán | Más adelante, los ejercicios del fisio robustecerán el tronco poco a poco.Later on, the therapist's exercises will strengthen the core little by little. |
Futuro Perfecto
Future Perfect
| Pronoun | Form | Context |
|---|---|---|
| yo | habré robustecido | Para entonces, yo ya habré robustecido la espalda con estiramientos cortos.By then, I will already have strengthened my back with short stretches. |
| tú | habrás robustecido | Antes del cierre, tú ya habrás robustecido las piernas con subidas suaves.Before closing time, you will already have strengthened your legs with gentle uphill walks. |
| él | habrá robustecido | Al final del día, la nueva rutina ya habrá robustecido las rodillas semana a semana.By the end of the day, the new routine will already have strengthened the knees week by week. |
| nosotros | habremos robustecido | Para mañana, nosotros ya habremos robustecido el grupo con reglas claras.By tomorrow, we will already have strengthened the group with clear rules. |
| vosotros | habréis robustecido | Antes de iros, vosotros ya habréis robustecido los hombros con bandas elásticas.Before leaving, you all will already have strengthened your shoulders with resistance bands. |
| ellos | habrán robustecido | Para esa hora, los ejercicios del fisio ya habrán robustecido el tronco poco a poco.By that hour, the therapist's exercises will already have strengthened the core little by little. |
Condicional
Conditional
| Pronoun | Form | Context |
|---|---|---|
| yo | robustecería | En un caso así, yo robustecería la espalda con estiramientos cortos.In a case like that, I would strengthen my back with short stretches. |
| tú | robustecerías | Con un poco más de tiempo, tú robustecerías las piernas con subidas suaves.With a little more time, you would strengthen your legs with gentle uphill walks. |
| él | robustecería | En esa situación, la nueva rutina robustecería las rodillas semana a semana.In that situation, the new routine would strengthen the knees week by week. |
| nosotros | robusteceríamos | Con ese panorama, nosotros robusteceríamos el grupo con reglas claras.With that outlook, we would strengthen the group with clear rules. |
| vosotros | robusteceríais | Llegado el caso, vosotros robusteceríais los hombros con bandas elásticas.If it came to that, you all would strengthen your shoulders with resistance bands. |
| ellos | robustecerían | En un día así, los ejercicios del fisio robustecerían el tronco poco a poco.On a day like that, the therapist's exercises would strengthen the core little by little. |
Condicional Perfecto
Conditional Perfect
| Pronoun | Form | Context |
|---|---|---|
| yo | habría robustecido | En otro momento, yo habría robustecido la espalda con estiramientos cortos.At another moment, I would have strengthened my back with short stretches. |
| tú | habrías robustecido | Con un poco más de margen, tú habrías robustecido las piernas con subidas suaves.With a little more margin, you would have strengthened your legs with gentle uphill walks. |
| él | habría robustecido | A esas alturas, la nueva rutina habría robustecido las rodillas semana a semana.By then, the new routine would have strengthened the knees week by week. |
| nosotros | habríamos robustecido | Con ese giro, nosotros habríamos robustecido el grupo con reglas claras.With that turn, we would have strengthened the group with clear rules. |
| vosotros | habríais robustecido | Llegados ahí, vosotros habríais robustecido los hombros con bandas elásticas.At that point, you all would have strengthened your shoulders with resistance bands. |
| ellos | habrían robustecido | En ese punto, los ejercicios del fisio habrían robustecido el tronco poco a poco.From there, the therapist's exercises would have strengthened the core little by little. |
Subjuntivo Presente
Present Subjunctive
| Pronoun | Form | Context |
|---|---|---|
| yo | robustezca | Es mejor que yo robustezca la espalda con estiramientos cortos.It is better that I strengthen my back with short stretches. |
| tú | robustezcas | Hace falta que tú robustezcas las piernas con subidas suaves.It is necessary that you strengthen your legs with gentle uphill walks. |
| él | robustezca | Conviene que la nueva rutina robustezca las rodillas semana a semana.It is wise that the new routine strengthen the knees week by week. |
| nosotros | robustezcamos | Importa que nosotros robustezcamos el grupo con reglas claras.It matters that we strengthen the group with clear rules. |
| vosotros | robustezcáis | Puede ser útil que vosotros robustezcáis los hombros con bandas elásticas.It may help if you all strengthen your shoulders with resistance bands. |
| ellos | robustezcan | Es posible que los ejercicios del fisio robustezcan el tronco poco a poco.It is possible that the therapist's exercises strengthen the core little by little. |
Subjuntivo Pretérito Perfecto
Present Perfect Subjunctive
| Pronoun | Form | Context |
|---|---|---|
| yo | haya robustecido | Ojalá yo haya robustecido la espalda con estiramientos cortos.Hopefully I have strengthened my back with short stretches. |
| tú | hayas robustecido | Puede que tú ya hayas robustecido las piernas con subidas suaves.Maybe you already have strengthened your legs with gentle uphill walks. |
| él | haya robustecido | Tal vez la nueva rutina haya robustecido las rodillas semana a semana.Perhaps the new routine has strengthened the knees week by week. |
| nosotros | hayamos robustecido | Quizá nosotros ya hayamos robustecido el grupo con reglas claras.Maybe we already have strengthened the group with clear rules. |
| vosotros | hayáis robustecido | Es probable que vosotros hayáis robustecido los hombros con bandas elásticas.It is likely that you all have strengthened your shoulders with resistance bands. |
| ellos | hayan robustecido | Puede ser que los ejercicios del fisio ya hayan robustecido el tronco poco a poco.It may be that the therapist's exercises already have strengthened the core little by little. |
Subjuntivo Pretérito Imperfecto
Imperfect Subjunctive
| Pronoun | Form | Context |
|---|---|---|
| yo | robusteciera | Si yo robusteciera la espalda con estiramientos cortos, se notaría enseguida.If I strengthened my back with short stretches, it would show right away. |
| tú | robustecieras | Si tú robustecieras las piernas con subidas suaves, costaría ocultarlo.If you strengthened your legs with gentle uphill walks, it would be hard to hide. |
| él | robusteciera | Si la nueva rutina robusteciera las rodillas semana a semana, daría mucho que hablar.If the new routine strengthened the knees week by week, it would give people plenty to talk about. |
| nosotros | robusteciéramos | Si nosotros robusteciéramos el grupo con reglas claras, todo iría por otro lado.If we strengthened the group with clear rules, everything would go another way. |
| vosotros | robustecierais | Si vosotros robustecierais los hombros con bandas elásticas, cambiaría el ambiente.If you all strengthened your shoulders with resistance bands, the mood would change. |
| ellos | robustecieran | Si los ejercicios del fisio robustecieran el tronco poco a poco, la escena sería otra.If the therapist's exercises strengthened the core little by little, the whole scene would be different. |
Subjuntivo Pretérito Pluscuamperfecto
Past Perfect Subjunctive
| Pronoun | Form | Context |
|---|---|---|
| yo | hubiera robustecido | Si yo hubiera robustecido la espalda con estiramientos cortos, aún se recordaría.If I had strengthened my back with short stretches, it would still be remembered. |
| tú | hubieras robustecido | Si tú hubieras robustecido las piernas con subidas suaves, eso habría dejado marca.If you had strengthened your legs with gentle uphill walks, that would have left a mark. |
| él | hubiera robustecido | Si la nueva rutina hubiera robustecido las rodillas semana a semana, todavía se hablaría de eso.If the new routine had strengthened the knees week by week, people would still be talking about it. |
| nosotros | hubiéramos robustecido | Si nosotros hubiéramos robustecido el grupo con reglas claras, el día habría seguido otro rumbo.If we had strengthened the group with clear rules, the day would have gone another way. |
| vosotros | hubierais robustecido | Si vosotros hubierais robustecido los hombros con bandas elásticas, el cambio se habría notado antes.If you all had strengthened your shoulders with resistance bands, the change would have shown earlier. |
| ellos | hubieran robustecido | Si los ejercicios del fisio hubieran robustecido el tronco poco a poco, nada habría quedado igual.If the therapist's exercises had strengthened the core little by little, nothing would have stayed the same. |
Subjuntivo Futuro
Future Subjunctive
| Pronoun | Form | Context |
|---|---|---|
| yo | robusteciere | Si yo robusteciere la espalda con estiramientos cortos, se notará enseguida.If I strengthen my back with short stretches, it will show right away. |
| tú | robustecieres | Si tú robustecieres las piernas con subidas suaves, costará ignorarlo.If you strengthen your legs with gentle uphill walks, it will be hard to ignore. |
| él | robusteciere | Si la nueva rutina robusteciere las rodillas semana a semana, dará mucho que hablar.If the new routine strengthens the knees week by week, it will give people plenty to talk about. |
| nosotros | robusteciéremos | Si nosotros robusteciéremos el grupo con reglas claras, todo irá por otro camino.If we strengthen the group with clear rules, everything will go another way. |
| vosotros | robusteciereis | Si vosotros robusteciereis los hombros con bandas elásticas, el ambiente cambiará rápido.If you all strengthen your shoulders with resistance bands, the mood will change fast. |
| ellos | robustecieren | Si los ejercicios del fisio robustecieren el tronco poco a poco, la escena será distinta.If the therapist's exercises strengthen the core little by little, the whole scene will be different. |
Subjuntivo Futuro Perfecto
Future Perfect Subjunctive
| Pronoun | Form | Context |
|---|---|---|
| yo | hubiere robustecido | Cuando yo hubiere robustecido la espalda con estiramientos cortos, ya se notará.When I have strengthened my back with short stretches, it will already show. |
| tú | hubieres robustecido | En cuanto tú hubieres robustecido las piernas con subidas suaves, será difícil no verlo.As soon as you have strengthened your legs with gentle uphill walks, it will be hard not to see. |
| él | hubiere robustecido | Cuando la nueva rutina hubiere robustecido las rodillas semana a semana, se verá de inmediato.When the new routine has strengthened the knees week by week, it will show at once. |
| nosotros | hubiéremos robustecido | Si para entonces nosotros hubiéremos robustecido el grupo con reglas claras, todo irá de otra manera.If by then we have strengthened the group with clear rules, everything will move differently. |
| vosotros | hubiereis robustecido | Cuando vosotros hubiereis robustecido los hombros con bandas elásticas, el ambiente sonará distinto.When you all have strengthened your shoulders with resistance bands, the mood will sound different. |
| ellos | hubieren robustecido | En cuanto los ejercicios del fisio hubieren robustecido el tronco poco a poco, el cambio quedará claro.As soon as the therapist's exercises have strengthened the core little by little, the change will be clear. |
Imperativo Afirmativo
Affirmative Imperative
| Pronoun | Form | Context |
|---|---|---|
| yo | - | - |
| tú | robustece | robustece las piernas con subidas suaves.Strengthen your legs with gentle uphill walks. |
| él | robustezca | Que la nueva rutina robustezca las rodillas semana a semana.Let the new routine strengthen the knees week by week. |
| nosotros | robustezcamos | robustezcamos el grupo con reglas claras.Strengthen the group with clear rules. |
| vosotros | robusteced | robusteced los hombros con bandas elásticas.Strengthen your shoulders with resistance bands. |
| ellos | robustezcan | Que los ejercicios del fisio robustezcan el tronco poco a poco.Let the therapist's exercises strengthen the core little by little. |
Imperativo Negativo
Negative Imperative
| Pronoun | Form | Context |
|---|---|---|
| yo | - | - |
| tú | no robustezcas | No no robustezcas las piernas con subidas suaves.Do not strengthen your legs with gentle uphill walks. |
| él | no robustezca | Que la nueva rutina no no robustezca las rodillas semana a semana.Let the new routine not strengthen the knees week by week. |
| nosotros | no robustezcamos | No no robustezcamos el grupo con reglas claras.Let us not strengthen the group with clear rules. |
| vosotros | no robustezcáis | No no robustezcáis los hombros con bandas elásticas.Do not strengthen your shoulders with resistance bands. |
| ellos | no robustezcan | Que los ejercicios del fisio no no robustezcan el tronco poco a poco.Let the therapist's exercises not strengthen the core little by little. |
Free web drill
Practice robustecer
1 / 1
Presente•yo
Yo ___ la espalda con estiramientos cortos.
I strengthen my back with short stretches.
Need grammar help?How to form Presente
Use Presente for facts, habits, current states, and regular actions.
Formation
- 1Remove the infinitive ending: -ar, -er, or -ir.
- 2Add the present endings for the subject.
- 3Watch high-frequency irregulars like ser, estar, ir, tener, hacer, and decir.
Pattern
-ar: o, as, a, amos, áis, an-er: o, es, e, emos, éis, en-ir: o, es, e, imos, ís, en
Examples
hablar -> yo hablocomer -> él comevivir -> vosotros vivís
Presente is the base system. Master the endings first, then handle irregular yo forms and stem changes.
Grammar to master with robustecer
Related Spanish grammar topics
Concepts that come up every time you conjugate robustecer. Each is a short, focused guide.
Common questions
Robustecer conjugation — frequently asked
Short, direct answers to what learners search most about robustecer.
- What does 'robustecer' mean in English?
- In Spanish, 'robustecer' means to strengthen. It is a irregular -ER verb used across all 18 standard Spanish tenses.
- Is robustecer an irregular verb in Spanish?
- Yes, robustecer is an irregular Spanish verb. It does not follow the regular -ER ending pattern in every tense — some forms change stem or use unique endings. The complete conjugation table on this page shows every irregular form.
- How do you conjugate robustecer in the present tense?
- Present tense (Presente) of robustecer: yo robustezco, tú robusteces, él/ella/usted robustece, nosotros robustecemos, vosotros robustecéis, ellos/ellas/ustedes robustecen.
- How do you conjugate robustecer in the preterite?
- Preterite (Pretérito Indefinido) of robustecer: yo robustecí, tú robusteciste, él/ella/usted robusteció, nosotros robustecimos, vosotros robustecisteis, ellos/ellas/ustedes robustecieron. This tense expresses completed past actions at a defined point in time.
- What is the imperfect tense of robustecer?
- Imperfect (Pretérito Imperfecto) of robustecer: yo robustecía, tú robustecías, él/ella/usted robustecía, nosotros robustecíamos, vosotros robustecíais, ellos/ellas/ustedes robustecían. The imperfect describes past habits, ongoing actions, and background states.
- What is the past participle of robustecer?
- The past participle of robustecer is 'robustecido'. It is used to form compound tenses with the auxiliary verb haber — for example, 'he robustecido' (I have strengthened), 'has robustecido', 'ha robustecido'.
- What is the gerundio (present participle) of robustecer?
- The gerundio of robustecer is 'robusteciendo'. It pairs with estar to form the present continuous (estoy robusteciendo) and other progressive tenses, indicating an action in progress.
Related verbs
Continue with verbs that share the same ending and difficulty band.