| Present "suffer" | I | suffer | |
| Present Continuous "suffer" | I | am suffering | |
| Simple past "suffer" | I | suffered | |
| Past Continuous "suffer" | I | was suffering | |
| Present perfect "suffer" | I | have suffered | |
| Present perfect continuous "suffer" | I | have been suffering | |
| Past perfect "suffer" | I | had suffered | |
| Past perfect continuous "suffer" | I | had been suffering | |
| Future "suffer" | I | will suffer | |
| Future continuous "suffer" | I | will be suffering | |
| Future perfect "suffer" | I | will have suffered | |
| Future perfect continuous "suffer" | I | will have been suffering |