Przekształcenie strony biernej na czynną
Łatwiej jest zrozumieć zdania w stronie czynnej niż zdania w stronie biernej. Przekształcenie ze strony biernej na czynną jest proste, lecz wymaga nieco praktyki. W poniższej tabeli, czas czasownika to be w stronie biernej jest zawsze taki sam, jak czas czasownika głównego w stronie czynnej. Aby przekształcić zdanie na stronę czynną, podmiot czynności musi być znany.
Czasownik to keep w stronie czynnej i biernej
| Czas | Strona czynna | Strona bierna | Zdanie w stronie czynnej | Zdanie w stronie biernej |
|---|---|---|---|---|
| Simple present | keep | is kept | I keep the butter in the fridge. | The butter is kept in the fridge. |
| Present continuous | is keeping | is being kept | John is keeping my house tidy. | My house is being kept tidy. |
| Simple past | kept | was kept | Mary kept her schedule meticulously. | Mary's schedule was kept meticulously. |
| Past continuous | was keeping | was being kept | The theater was keeping a seat for you. | A seat was being kept for you. |
| Present perfect | have kept | have been kept | I have kept all your old letters. | All your old letters have been kept. |
| Past perfect | had kept | had been kept | He had kept up his training regimen for a month. | His training regimen had been kept up for a month. |
| Czas przyszły prosty | will keep | will be kept | Mark will keep the ficus. | The ficus will be kept. |
| Tryb przypuszczający czasu teraźniejszego (Conditional Present) | would keep | would be kept | If you told me, I would keep your secret. | If you told me, your secret would be kept. |
| Tryb przypuszczający czasu przeszłego (Conditional Past) | would have kept | would have been kept | I would have kept your bicycle here if you had left it with me. | Your bicycle would have been kept here if you had left it with me. |
| Bezokolicznik czasu teraźniejszego (Present Infinitive) | to keep | to be kept | She wants to keep the book. | The book wants to be kept. |
| Bezokolicznik czasu przeszłego (Perfect Infinitive) | to have kept | to have been kept | Judy was happy to have kept the puppy. | The puppy was happy to have been kept. |
| Imiesłów czasu teraźniejszego (Present Participle) i rzeczownik odczasownikowy (Gerund) | keeping | being kept | I have a feeling that you may be keeping a secret. | I have a feeling that a secret may be being kept. |
| Imiesłów czasu przeszłego (Perfect Participle) | having kept | having been kept | Having kept the bird in a cage for so long, Jade wasn't sure it could survive in the wild. | The bird, having been kept in a cage for so long, might not survive in the wild. |