第十五章 連詞 連詞概說

　　連詞不能在句中擔(dān)任句子成分，而只起連接詞與詞(a)，短語與短語(b)以及句與句(c)的作用，如：

　　a. Are you going to have the contest today or tomorrow?

　　比賽是今天還是明天舉行?

　　b. Do you have your coaching in the evening or in the afternoon?

　　你們的輔導(dǎo)是在晚上還是在下午?

　　c. Hurry up, or we'll be late.

　　趕快，否則我們就遲到了。

　　這里可以看出同一連詞or，可以起三種不同的作用。有些連詞，有時(shí)把自己所在的句子和前面的句子，在意思上連接起來，使前后文比較連貫，如：

　　At first she didn't want to go. Later, however, she changed her mind.

　　開始她不想去，但后來她改變了主意。

　　一般說來，連詞在英語中運(yùn)用還比較多，這是值得注意的。

　　連詞可分為兩類：

　　1.并列連詞:用來連接平行的詞、短語或分句。常見的并列連詞有and, but, or, nor, so, therefore, get, however, nevertheless, for, hence, as well as, both...and, not only...but also, either...or, neither...nor, (and) then。

　　2.從屬連詞:用來引起一個(gè)從句在句中擔(dān)任一個(gè)成分。常見的從屬連詞有after, when, before, as, while, since, until, till, although, though, if, even if, unless, lest, because, than, that, whether, so that, as soon as, as long as, in order that, as if, as though, suppose (that), provided (that), in case (that), on condition (that), now that, seeing that, so...that, such...that, as...as, so...as 等。