... had gone away.(P1) It was thought that Mary had gone away.(P2) Mary was thought to have gone away.IV. Các đại từ bất định: No one, Nobody, Nothing,……… Ex: - (A) No one can answer this ... Nothing,……… Ex: - (A) No one can answer this question. (P) This question can’t be answered . - (A) They haven’t done anything. (P) Nothing has been done.EXERCISES Change these sentences into ... year.…………………………………………………….………………………… 5. My aunt made this sweater for her son.…………………………………………………….………………………… 6. The television station has broadcast all the 22nd Sea-Games competitions.…………………………………………………….…………………………...