题目内容
20.最近,学生们都忙着复习功课吗?Have the students been busy going over their homework recently?.
分析 Have the students been busy going over their homework recently?
解答 答案:Have the students been busy going over their homework recently?忙着复习的这个动作发生在过去,一直延续到现在,并且还会继续坚持,故用现在完成时have/has+过去分词,主语the students是复数,故have,这里是一般疑问句,故将have放句首,be busy doing sth 忙于做某事,be的过去分词been,故Have the students been busy,复习功课go over their homework,recently最近,副词,放句末,故答案是Have the students been busy going over their homework recently?
点评 现在完成时有两种用法1.过去发生的某一动作对现在造成的影响或结果或到现在为止已经发生或完成的动作.2.表示过去发生的、持续到现在的动作或状态.
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