倒裝句之部分倒裝

當否定詞語置于句首以表示強調時，其句中的主謂須用倒裝結構。 這些否定詞包括no, little, hardly, seldom, never, not only, not until等。

1) 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. 看到Not until…的句型，我們知道為一倒裝句，答案在C，D 中選一個。

改寫為正常語序為，Man did not know what heat is until the early years of the 19th. 現在將not提前，后面就不能再用否定了,否則意思就變了。