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Chủ Nhật, 31 tháng 7, 2011

THE PRESENT PERFECT PASSIVE

(Thì hiện tại hoàn thành thể bị động)

1. Form:

Khẳng định: S + have / has + been + V3/-ed + (by + O)

Phủ định: S + haven’t / hasn’t + been + V3/-ed + (by + O)

2. Examples:

a/ Someone has cleaned the room.
→ The room has been cleaned.

b/ Jack has opened the gifts.
→ The gifts have been opened by Jack.

c/ They haven’t used these machines at least five years.

→ These machines haven’t been used at least five years.

d/ Have they delivered the package yet?
→ Has the package been delivered yet?

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