____ hard before,Tom is afraid of failing in the exam.A.Having never worked B.Never have workedA为什么不对?这个顺序有什么讲究?

分类: 作业答案 • 2022-01-02 15:29:50

问题描述：

____ hard before,Tom is afraid of failing in the exam.
A.Having never worked
B.Never have worked
A为什么不对?这个顺序有什么讲究?

答

非谓语动词的否定式要在非谓语动词前面加否定词
比如 tell sb not to do sth
not having done