7初中语法系列连词.ppt

连词;;5. and: “和”在肯定句中表并列 or: “和”在否定句中表并列 另外：1)or “或者”用于选择疑问句 2)or “否则” eg. ①.Which do you like better, tea or milk? ②.Hurry up, or you’ll be late for school. 6.but “但是”表转折 eg. I listened, but I heard nothing. 注意：1)though(虽然), but(但是)不能连用 2)not … but 不是…而是 eg. This book isn’t mine but yours.; both….and ….两者…都；既….又…; 连接并列主语时用复数。注意： both….and ….用在否定句中表示部分否定。 例：He can’t play both the violin and the piano.他并非既会演奏小提琴，又会演奏钢琴。 neither…nor: 既不…也不 连接两主语，就近原则 7. either…or: 或者…或者…;连接两主语，就近原则。Either you and he is wrong. either….or…在否定句中表示部分否定，不是….就是…; Either you or I am not right.不是你不对，就是我不对。 not only … but also:不但…而且…; 连接主语时，就近原则。Not only you but also your mother is kind.;not only…but also…可以和as well as 互换。例：She is not only beautiful but also kind.= She is kind as well as beautiful.她不但漂亮，而且心地很好。 Both he and I are students. Neither he nor I am a student. 引导宾语从句的连词： 1 that引导的宾语从句：表示陈述意义的宾语从句，从句由陈述句转化来，这时从句和主句时态一致。另一类特征是从句的主句谓语动词多是hope, think; find; be sure等。 The teacher said ( that ) they would have a test next week. I think ( that) you can help me. ;2if和whether引导由一般疑问句转变成的宾语从句。If和whether引导宾语从句可互换。If 一般用于口语，whether用较正式或书面语中。 “Do you know John?” he asked me.= He asked me if/whether I knew John. 但在下列情况中只能用whether而不能用if. 与or not连用时 I don’t know whether I should go or not. 在介词后作宾语时。 I am thinking about whether you can swim.;与动词不定式连用时。 I don’t know whether to go. 在主语从句，表语从句和同位语从句中。 The problem is it is true or not. 在动词discuss引导的宾语从句中。 They are discussing whether they will have a class meeting. 3 wh-疑问词引导的宾语从句。 Can you tell me how I can get to the post office? 引导时间状语从句的连词。Do you know what time he left for Shanghai last night. 引导时间状语从句的从属连词：when; while; as; after; before; since; till/until; as soon as等。 l;when表示当…..的时候，指的是一点或一段时间。如：When I arrive there, I will call you。我到那里后，我会给你打电话。