问题描述:
He was tired because he had had inadequate sleep last night.
为什么这里出现了两个had呢,这是怎么回事,
为什么这里出现了两个had呢,这是怎么回事,
问题解答:
我来补答展开全文阅读
问题描述:
问题解答:
我来补答