问题描述：
倒装：Hardly when ,not until
Hardly had he entered the house when it began to rain.
Not until mom came back did she know the truth.
以上两个句式,如果仿照hardly句式,Not until 句式为什么不是这样的：Not until did mom came back she know the truth.
不太清楚到底哪部分应该倒装?
Hardly had he entered the house when it began to rain.
Not until mom came back did she know the truth.
以上两个句式,如果仿照hardly句式,Not until 句式为什么不是这样的：Not until did mom came back she know the truth.
不太清楚到底哪部分应该倒装?
问题解答：
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