Question

急求英语问题答案和解释！！！

Only then ______how much damage had been caused.
A.she realized B.she had realized
C.had she realized D.did she realize
求解释和答案，解释最好详细一点
为什么用倒装？

Answer 1

这是倒装的的一种结构，为 only置于句首时，后如果出现状语成分（then,in this way ,by doing so,when从句等等）其后的主句就会使用倒装结构。例如：Only in this way can we make great progress./Only when he arrived at the station did he realize that the pop star had left.

Answer 2

选择D，倒装结构，还原一下是 she realized how much ···had been···，
这是固定句型 --only then, hardly when 这样的句型中都有倒装形式

Answer 3

选D onlythen 置于句首时永远用倒装 又因为主句用的是过去完成时，所以从句用过去完成时，这是过去完成时的结构。

Answer 4

only置于句子前时，且紧跟状语时，句子需要部分倒装。

Answer 5

选D. 因为是only放句首，所以要用倒装