czasownik posiłkowy to have (have – had – had) służy dotworzenia wszystkich czasów typu Perfect:
to have + imiesłów bierny (3 forma czasownika)
| Present Perfect | I have already done my work. |
| Present Perfect Continuous | I have been doing my work for an hour. |
| Past Perfect | I had done my work before I went to bed. |
| Past Perfect Continuous | I had been doing my work for an hour when Tom came. |
| Future Perfect | I will have done my work by 2 pm. |
| Future Perfect in the Past | I would have done my work if I had time. |