I didn’t know that Joe had to get up early, so I didn’t wake him up. A. If I had known that Joe had to get up early, I would have woken him up. B. Provided that I had woken Joe up, I would

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I didn’t know that Joe had to get up early, so I didn’t wake him up.

If I had known that Joe had to get up early, I would have woken him up.

Provided that I had woken Joe up, I would know that he had to get up early

Much as Joe had been woken up, he would have to get up early.

Unless I had known that Joe had to get up early, I would have woken him up.

Giải thích

Câu này dịch như sau: Tôi đã không biết rằng Joe phải dậy sớm, vì vậy tôi đã không đánh thức anh ấy dậy.

A. Nếu tôi biết rằng Joe phải dậy sớm tôi sẽ đánh thức anh ấy dậy.

=> Câu điều kiện loại 3: If S + had Ved/ V3, S + would have Ved/ V3

B. Nếu tôi đánh thức Joe, tôi sẽ biết anh ấy phải dậy sớm.

C. Mặc dù Joe đã được đánh thức, anh ấy sẽ phải dậy sớm.

D. Nếu tôi không biết Joe phải dậy sớm, tôi sẽ đánh thức anh ấy.