典型例题：

　　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

　　答案为D.　否定词Not在句首，要求用部分倒装的句子结构。

　　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

　　答案为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

　　解析：答案为B.　句中的nor引出部分倒装结构，表示"也不"。由 so, neither, nor引导的倒装句，表示前一情况的重复出现。其中, so用于肯定句, 而 neither, nor 用在否定句中。