1） so… that 句型中的so 位于句首時，需倒裝。例如：
So frightened was he that he did not dare to move an inch. 他害怕得很，動也不敢動。
2） 在某些表示祝愿的句型中。例如：
May you all be happy. 愿你們都快樂。
3） 在虛擬語氣條件句中從句謂語動詞有were， had， should等詞，可將if 省略，把 were， had， should 移到主語之前，采取部分倒裝。例如：
Were I you， I would try it again. 我是你的話，就再試一次。
典型例題：
1）Not until the early years of the 19th century___ what heat is
A. man did know B. man knew C. didn't man know D. did man know
答案為D. 否定詞Not在句首，要求用部分倒裝的句子結構。
2）Not until I began to work ___ how much time I had wasted.
A. didn't I realize B. did I realize C. I didn't realize D. I realize
答案為B.
3） Do you know Tom bought a new car？
I don't know， ___.
A. nor don't I care B. nor do I care
C. I don't care neither D. I don't care also
答案為B. 句中的nor引出部分倒裝結構，表示"也不".由 so， neither， nor引導的倒裝句，表示前一情況的重復出現。其中， so用于肯定句， 而 neither， nor 用在否定句中。
So frightened was he that he did not dare to move an inch. 他害怕得很，動也不敢動。
2） 在某些表示祝愿的句型中。例如：
May you all be happy. 愿你們都快樂。
3） 在虛擬語氣條件句中從句謂語動詞有were， had， should等詞，可將if 省略，把 were， had， should 移到主語之前，采取部分倒裝。例如：
Were I you， I would try it again. 我是你的話，就再試一次。
典型例題：
1）Not until the early years of the 19th century___ what heat is
A. man did know B. man knew C. didn't man know D. did man know
答案為D. 否定詞Not在句首，要求用部分倒裝的句子結構。
2）Not until I began to work ___ how much time I had wasted.
A. didn't I realize B. did I realize C. I didn't realize D. I realize
答案為B.
3） Do you know Tom bought a new car？
I don't know， ___.
A. nor don't I care B. nor do I care
C. I don't care neither D. I don't care also
答案為B. 句中的nor引出部分倒裝結構，表示"也不".由 so， neither， nor引導的倒裝句，表示前一情況的重復出現。其中， so用于肯定句， 而 neither， nor 用在否定句中。