在讲完从句语块中连词用法解题思路和从句的分类后，今天我们讨论并列连词用法的重点和难点。
并列连词是用来连接语法地位相同的单词、短语及句子的连词。并列的单词和短语叫并列结构；并列的句子叫并列句。由并列连词把两或两以上的句子连接在一起的复合句叫并列复合句。
并列连词常考but, and, or这三个，当然其它并列连词也要掌握。
1. 表示“递进”的并列连词(词组)有：and，as well as， not only… but (also), both…and, neither…nor, nor等。并列连词要注意接对等句子成分，如：
Not only he || but (also) I am a teacher. 并列主语，用就近原则
She not only sings well | but (also) dances gently. 并列谓语
Hiking is good exercise | as well as fun.
并列表语，fun在这里是抽象名词与exercise并列，不是与good并列。
He can not speak English, | nor can I. 表否定的neither, nor在句首时，主谓要倒装。
..., nor can I. =..., I can't, either.
2.表示“转折”的并列连词有： but, yet, while等。
1) yet接主谓结构时相当于but，但but还可并列主语、谓语、表语等并列成分，如：
I have a pen | but no pencil. but并列宾语
I did nothing | but watch it. but并列谓语
He worked hard, || yet/but he failed. yet/but并列主谓结构
2) while侧重“对照、对比”，主语通常是不同的人或事，but的主语通常是同一个人，如：
Schools in the north tend to be better equipped, | while those in the south are relatively poor.
3.表示“选择”的并列连词有：or, whether...or, or else, either...or 等。
1）not either...or = neither...nor。
He is not either drunk | or mad. = He is neither drunk | nor mad.
2）祈使句 or 相当于一个否定的if从句：
Hurry up || or you will be late. = If you don't hurry up, you will be late.
3) 祈使句 and 相当于一个肯 定的if从句：
Study hard || and you will make great progress.= If you study hard, you will make great progress.
4.表示“因果”的并列连词有：for, so等。
1)表原因时，for是并列连词，引导并列句；because是从属连词（通常不在句首），引导从句。两个并列句不能前后互换位置，而从句可以在主句前，也可在主句后。如：
Let's get moving, | or else we'll miss the train. 后半句不能提前。
<When they got there>, the train had left. = The train had left <when they got there>.
2)表原因时，for表示推断的理由；because表示“有其因必有其果”。如：
The fuse must be broken | for the lights went out. 灯灭了可能是保险丝断了，也可能是其它停电、短路、灯泡坏了等原因。
The lights went out <because the fuse was broken>. 保险丝断了，灯一定会灭。
3)汉语说“因为...所以“，但英语用了because就不能再用so，反之亦然。
4) ”不同主语，同一情况“用下列句式:
(1) ”so 助动词 主语的倒装结构，如：
You like apples, | so do I = You like apples and I like apples, too.
(2) 如果是否定句就要用”neither/nor 倒装句“：
Mary doesn't like dancing, neither/nor does Jack. =Mary doesn't like dancing, and Jack does (like dancing),either.
(3) 如果既有肯定又有否定，或前后助动词不同，用“so it is/was with sb.结构”：
He likes singing but doesn't like dancing, || so it is with me.
=He likes singing but doesn't like dancing, || and I like singing but don't like dancing, either.
Marx was born in Germany and learned English well, || so it was with Engels.
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