Not for a moment______what she said.

题目

Not for a moment______what she said.
A.he has doubted B.he doubts
C.he did doubt D.did he doubt
请问以上题目为什么选择 D 选项,望各位老师和学长赐教.

答案

否定副词（not, never, hardly, nowhere.）置于句首,句子要用不完全倒装.

这里是Not for a moment 置于句首,所以要用倒装形式. 助动词提前到主语前面,相似的用法还有：

Never have I been to Seoul. 我从没去过首尔.