____ hard before,Tom is afraid of failing in the exam.A.Having ne_英语解答

____ 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?

人气：259 ℃　时间：2019-12-20 01:14:15

解答

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