部分倒装是指将谓语的一部分如助动词或情态倒装至主语之前。如果句中的谓语没有助动词或情态动词,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。
例句:
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。
注意: 如否定词不在句首不倒装。
例句:
I have never seen such a performance.
The mother didn't leave the room until the child fell asleep.
例题:
1. -Why can't I smoke here?
-At no time______ in the meeting-room
A. is smoking permitted;B.smoking is permitted;
C. smoking is it permitted;D.does smoking permit;
答案:A。
解析:这是一个倒装问题。当否定词语置于句首以表示强调时,其句中的主谓须用倒装结构。 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;
答案:D。
解析:看到Not until…的句型,我们知道为一倒装句,答案在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提前,后面就不能再用否定了,否则意思就变了。