45. Mr. Kent hasn’t washed his car for ages. 46. An earthquake has destroyed the whole town. 47. An English expert is traini

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1. 45. His car hasn’t been washed by Mr. Kent for ages.

   46. The whole town has been destroyed by an earthquake.

   48. Our national football team is being trained by an English expert.

   49. When was that hospital opened (bt them)?

   50. Why is grass kept in the pasture by farmer?

   – keep – kept – kept: giữ

   51. Mary’s dog was killed by a lion last week.

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   – Bị động của thì hiện tại hoàn thành:

   $(+)$ S + have/ has + been + V(pp) + (by O)

   $(-)$ S + have/ has + not + been + V(pp) + (by O)

   – Bị động của thì hiện tại đơn:

   $(+)$ S + am/ is/ are + V(pp) + (by O)

   $(?)$ Am/ Is/ Are + S + V(pp) + (by O)?

   – Bị động của thì quá khứ đơn:

   $(+)$ S + was/ were + V(pp) + (by O)

   $(?)$ Was/ Were + S + V(pp) + (by O)?

   – Bị động của thì hiện tại tiếp diễn:
   $(+)$ S + am/is/are + being + V(pp) + (by O)

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