5) She must have listened to our conversation. (must + have + QK phân từ)

6) He couldn’t have understood what I said. (could + have + QK phân từ)

7) I must have forgotten to turn it off. (must + have + QK phân từ)

8) The driver couldn’t have seen the red light. (could + have + QK phân từ)

9) I must have been asleep. (must + have + QK phân từ)

10) She couldn’t have seen me. (could + have + QK phân từ)

* Các MODAL VERB được dùng trong quá khứ: COULD / MUST / MAY / MIGHT / SHOULD + HAVE + quá khứ phân từ

@tryphena

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