全国大众英语测验语法——倒装句之部分倒装
部分倒装是指将谓语的一部分如助动词或模样形状倒装至主语之前。如果句中的谓语没有助动词或模样形状动词，则需添加助动词do, does或did，并将其置于主语之前。
1)句首为否定或半否定的词语，如no, not, never, seldom, little, hardly, at no time, in no way, not until…等。
Never have I seen such a performance.
Nowhere will you find the answer to this question.
Not until the child fell asleep did the mother leave the room.
当Not until引出主从复合句，主句倒装，从句不倒装。
留意：如否定词不在句首不倒装。
I have never seen such a performance.
The mother didn't leave the room until the child fell asleep.
典范例题
1)Why can't I smoke here?
At no time___ in the meeting-room
A. is smoking permittedB.smoking is permitted
C. smoking is it permittedD.does smoking permit
谜底A.这是一个倒装题目。当否定词语置于句首以默示夸张时，其句中的主谓须用倒装构造。这些否定词包括no, little, hardly, seldom, never, not only, not until等。本题的正常语序是 Smoking is permitted in the meeting-room at no time.
2） Not until the early years of the 19th century ___ what heat is.
A. man did know B. man know C. didn't man know D. did man know
谜底D.看到Not until…的句型，我们晓得为一倒装句，谜底在C，D中选一个。
改写为正常语序为，Man did not know what heat is until the early years of the 19th.现在将not提早，背面就不能再用否定了,不然意思就变了。

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