无论如何你不会找到这个问题的答案的。
母亲一直到孩子入睡后离开房间。
当Not until引出主从复合句，主句倒装，从句不倒装。注意：如否定词不在句首不倒装。例如：
I have never seen such a performance.
The mother didn't leave the room untilthe child fell asleep.
以否定词开头作部分倒装
如Not only…but also,Hardly/Scarcely…when,No sooner…than等，要倒装。例如：
Not only did he refuse the gift,he alsoseverely criticized the sender.他没有收下礼物，还狠狠批评了送礼的人。
Hardly had she gone out when a student cameto visit her.她刚出门，就有个学生来访。
No sooner had she gone out than a studentcame to visit her.她刚出门，就有个学生来访。
so,neither,nor作部分倒装
用这些词表示"也"、"也不"的句子要部分倒装。例如：
Tom can speak French.So can Jack.汤姆会讲法语，杰克也会。
If you won't go,neither will I.你不去，我也不去。
Tom asked me to go to play football and so I did.汤姆邀我去踢球，我去了。
---It's raining hard.---So it is.雨下得真大。是呀。
only在句首倒装的情况。例如：
Only in thisway,can you learn English well.只有这样，你才能学好英语。
Only afterbeing asked three times did he come to the meeting.叫了三次，他才来参加会议。
如果句子为主从复合句，则主句倒装，从句不倒装。例如：
Only when heis seriously ill does he ever stay in bed.病得狠重时，他才卧床休息。
as,though引导的倒装句
as/though引导的让步从句必须将表语或状语提前(形容词,副词,分词,实义动词提前)。但需注意：
1)句首名词不能带任何冠词。
2)句首是实义动词,其他助动词放在主语后。如果实义动词有宾语和状语，随实义动词一起放在主语之前。例如：
Try hard as he will,he never seems able todo the work satisfactorily.他工作很努力，但总不能让人满意。
注意：让步状语从句中，有though，although时，后面的主句不能有but，但是though和yet可连
