Do you know why he stayed up so late last night?To prepare for the coming exam.

分类: 作业答案 • 2021-12-28 17:06:42

问题描述：

Do you know why he stayed up so late last night?To prepare for the coming exam.
动词不定式短语可做原因状语吗?

答

不定式作目的状语.本句是省略句.
完整的句子应如下:
(He stayed up so late last night )to prepare for the coming exam.
他昨晚熬夜是为了准备即将到来的考试.