John was not here yesterday. Perhaps he was ill. John needn't be here yesterday because

49/50

Mark the letter A, B, C, or D on you answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.

John was not here yesterday. Perhaps he was ill.

John needn't be here yesterday because he was ill.

Because of his illness, John shouldn't have been here yesterday.

John might have been ill yesterday, so he was not here.

John must have been ill yesterday, so he was not here.

Giải thích

Đáp án C.

Might have done sth: dự đoán việc gì đó xảy ra trong quá khứ (chưa biết chắc nó có như vậy hay không) → Đáp án C là chính xác

Cần phân biệt giữa must have done sth, might have done sth: Must have done sth: suy đoán logic về 1 sự việc trong quá khứ, thường có dấu hiệu đi kèm, mang hàm nghĩa chắc chắn nhiều hơn may và might.