| Present Simple - Presente (Present) "strengthen" | I | strengthen | |
| Presente Contínuo (Present Continuous) (Present Continuous) "strengthen" | I | am strengthening | |
| Tempo passado (Simple past) "strengthen" | I | strengthened | |
| Passado Contínuo (Past Continuous) "strengthen" | I | was strengthening | |
| Present Perfect (Present perfect) "strengthen" | I | have strengthened | |
| Perfeito Presente Contínuo (Present Perfect Continuous) "strengthen" | I | have been strengthening | |
| Past Perfect (Present perfect) "strengthen" | I | had strengthened | |
| Perfeito presente contínuo (Past perfect continuous) "strengthen" | I | had been strengthening | |
| O futuro (Future) "strengthen" | I | will strengthen | |
| Futuro do Pretérito (Future Continuous) "strengthen" | I | will be strengthening | |
| Futuro (Future perfect) "strengthen" | I | will have strengthened | |
| Perfeito Futuro do Pretérito (Future perfect continuous) "strengthen" | I | will have been strengthening |