⑨for 表示对前面句子进行解释,不能放句首,常用逗号与前面分句隔开,也可以不用.
because指直接原因,回答why的问题,常放在主句后面。
as比because弱,表示显而易见的原因,常放在句首。
since \ now that “既然”,常放句首。
He is absent because he is ill. 他不来因为他病了。
As you are the oldest, you should take care of the others. 由于你最大,你应该照顾其他人。
Now that/Since everybody is here, let’s begin our meeting. 既然大家都来了,咱们开会吧。
It is morning, for the birds are singing in the trees. 鸟叫了,早晨来了。
⑩either…nor 意思为"既不……也不……"谓语动词采用就近原则,与nor后的词保持一致。 Neither you nor he is to blame.
二、 辨清不同功能的并列连词
在写作中,我们必须认真分析被连接起来的简单句之间内在的逻辑关系,然后选择恰当的并列连词,才能真正写出质量好的并列句。
请认真研读以下并列句,分析其逻辑关系。试试看,如果用别的功能的并列句连词替换,逻辑关系是否会仍然成立?
a. He works hard, and he plays hard too.分析:在分句1的意思的基础上有递进。其含义相当于:He not only works hard, but also plays hard. / He plays hard as well as works hard.
b. I was tired, but I felt happy. 分析:分句2的意思不是分句1意思的顺接,而是出现转折的结果。
c. We stayed at home, for it was raining. 分析:分句2是分句1的原因的补充。
d. It was cold, so we decided to stay at home. 分析:分句2是分句1的结果。
e. Hurry up, or you’ll be late for class. 分析:分句2是与分句1的结果相反的结果。
由以上的分析可见,并列连词的选择也是要遵循句子间的逻辑关系的,如果不小心,同样会犯逻辑错误。