I am used to traveling by air and only on one occasion have I ever felt frightened.have I 在句中为什么这么用为什么要加have,

分类: 作业答案 • 2022-01-04 12:13:58

问题描述：

I am used to traveling by air and only on one occasion have I ever felt frightened.
have I 在句中为什么这么用为什么要加have,

答

only放于句首，句子倒装

答

only on one occasion have I ever felt frightened．其中on one occasion 是插入语而已，而ONLY开头，后面就要倒装的，所以是 have I
与EVER等词一起出现的，要用现在完成时，所以用HAVE

答

have 是助动词这个句子是用only 把状语提前后面就要用倒装语序再说后面的是完成时所以就把助动词only 提前拉

答

是倒装，正常语序是 i have felt ....