| Present | Past | Future | |
|---|---|---|---|
| I | strengthen | strengthened | will strengthen |
| you | strengthen | strengthened | will strengthen |
| he/she | strengthens | strengthened | will strengthen |
| we | strengthen | strengthened | will strengthen |
| you | strengthen | strengthened | will strengthen |
| they | strengthen | strengthened | will strengthen |
| I | strengthen |
| you | strengthen |
| he/she | strengthens |
| we | strengthen |
| you | strengthen |
| they | strengthen |
| I | strengthened |
| you | strengthened |
| he/she | strengthened |
| we | strengthened |
| you | strengthened |
| they | strengthened |
| I | will strengthen |
| you | will strengthen |
| he/she | will strengthen |
| we | will strengthen |
| you | will strengthen |
| they | will strengthen |
| Present | Past | Future | |
|---|---|---|---|
| I | have strengthened | had strengthened | will have strengthened |
| you | have strengthened | had strengthened | will have strengthened |
| he/she | has strengthened | had strengthened | will have strengthened |
| we | have strengthened | had strengthened | will have strengthened |
| you | have strengthened | had strengthened | will have strengthened |
| they | have strengthened | had strengthened | will have strengthened |
| I | have strengthened |
| you | have strengthened |
| he/she | has strengthened |
| we | have strengthened |
| you | have strengthened |
| they | have strengthened |
| I | had strengthened |
| you | had strengthened |
| he/she | had strengthened |
| we | had strengthened |
| you | had strengthened |
| they | had strengthened |
| I | will have strengthened |
| you | will have strengthened |
| he/she | will have strengthened |
| we | will have strengthened |
| you | will have strengthened |
| they | will have strengthened |
| Imperative | |
|---|---|
| I | - |
| you | strengthen |
| he/she | - |
| we | - |
| you | strengthen |
| they | - |
| I | - |
| you | strengthen |
| he/she | - |
| we | - |
| you | strengthen |
| they | - |
| Present | Past | Future | |
|---|---|---|---|
| I | am strengthening | was strengthening | will be strengthening |
| you | are strengthening | were strengthening | will be strengthening |
| he/she | is strengthening | was strengthening | will be strengthening |
| we | are strengthening | were strengthening | will be strengthening |
| you | are strengthening | were strengthening | will be strengthening |
| they | are strengthening | were strengthening | will be strengthening |
| I | am strengthening |
| you | are strengthening |
| he/she | is strengthening |
| we | are strengthening |
| you | are strengthening |
| they | are strengthening |
| I | was strengthening |
| you | were strengthening |
| he/she | was strengthening |
| we | were strengthening |
| you | were strengthening |
| they | were strengthening |
| I | will be strengthening |
| you | will be strengthening |
| he/she | will be strengthening |
| we | will be strengthening |
| you | will be strengthening |
| they | will be strengthening |
| Present | Past | Future | |
|---|---|---|---|
| I | have been strengthening | had been strengthening | will have been strengthening |
| you | have been strengthening | had been strengthening | will have been strengthening |
| he/she | has been strengthening | had been strengthening | will have been strengthening |
| we | have been strengthening | had been strengthening | will have been strengthening |
| you | have been strengthening | had been strengthening | will have been strengthening |
| they | have been strengthening | had been strengthening | will have been strengthening |
| I | have been strengthening |
| you | have been strengthening |
| he/she | has been strengthening |
| we | have been strengthening |
| you | have been strengthening |
| they | have been strengthening |
| I | had been strengthening |
| you | had been strengthening |
| he/she | had been strengthening |
| we | had been strengthening |
| you | had been strengthening |
| they | had been strengthening |
| I | will have been strengthening |
| you | will have been strengthening |
| he/she | will have been strengthening |
| we | will have been strengthening |
| you | will have been strengthening |
| they | will have been strengthening |