第九讲:连词
一.连词的概念(什么是连词?)
用来连接词与词、短语与短语或句子与句子的词。连词不能独立担任句子成分而只起连接作用。
二.常用连词用法详解
(1) and 表示并列关系,意为“也;和”
如:Tom and Mary are neighbours.
Sit down and tell me all about it.
She is a girl and I am a boy.
注意:
① 连接多个成份时,只在最后两个成份间用and,前面的成份间用逗号。
如:He is tall, thin and handsome.
② 表示“和”时,and通常用于肯定句中,否定句中则用or。
如:I like milk and coffee.
I don’t like milk or coffee.
(2) but表示转折,意为“但是”。
如:It’s an old car, but it’s very good.
(3) so表示因果,意为“因此;所以”。
如:It is raining, so we have to stay at home.
(4) or表示选择,意为“或者;还是”。
如:Would you like a cup of tea or coffee?
(5) because表示原因,意为“因为”。
如:Tom didn’t come to school yesterday because he was ill.
(6) though/although表示让步,意为“尽管;虽然”。
如:Though he is small, he knows a lot about history.
注意:though、although不能与but连用。
(7) both…and…表示并列,意为“两者都…..;既……又……”。
如:Both Tom and Mary are students.
(8) not only…but also…表示并列,意为“不但……而且……”。
如:Not only Su Tong but also his parents are there.
(9) either…or…表示选择,意为“或者……或者……”。
如:Either you or he is right.
(10) neither…nor…表示并列,意为“既不……也不……”。
如:Neither Tom nor I am interested in it.
(11) if表示条件,意为“如果”。
如:If you need money, I can lend you some.