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