1）Why can‘t I smoke here？ At no time___ in the meeting-room.
A. is smoking g is permitted
C. smoking is it smoking permit
答案A. 這是一個(gè)倒裝問題。當(dāng)否定詞語置于句首以表示強(qiáng)調(diào)時(shí)，其句中的主謂須用倒裝結(jié)構(gòu)。 這些否定詞包括no， little， hardly， seldom， never， not only， not until等。本題的正常語序是 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. 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(gè)。改寫為正常語序?yàn)椋?Man did not know what heat is until the early years of the 19th. 現(xiàn)在將not提前，后面就不能再用否定了，否則意思就變了。
No sooner___ than it began to rain heavily.
A. the game began the game begun
C. did the game begin the game begun
答案D. 以具有否定意義的副詞放在句首時(shí)，一般采用倒裝句（謂語前置）。這類表示否定意義的詞有never， seldom， scarcely， little， few， not， hardly， 以及not only…but （also）， no sooner…than， hardly… when scarcely… when等等。
-Do you know Jim quarrelled with his brother？
-I don‘t know， _____.
A. nor don‘t I careB. nor do I careC. I don’t care neitherD. I don‘t care also
答案：B. nor為增補(bǔ)意思“也不關(guān)心”，因此句子應(yīng)倒裝。A錯(cuò)在用 don‘t 再次否定， C neither 用法不對(duì)且缺乏連詞。 D缺乏連詞。