1、Lesson140ppt课件2 Was John answering the telephone?ppt课件3 Yes, he was. The telephone engineer.s,ppt课件6extraextraoverseasoverseasengineeringcompanycompanylineppt课件7ppt课件8ppt课件9123456ppt课件11company伴侣；朋友 ppt课件12ppt课件13extra adj.额外的 adj. 附加的extra moneyppt课件14ppt课件15line n.线路 v. 画线于；排列；使成行 in line 排成一行 row
2、 n. 排 s,ppt课件19翻译一下吧！ My wife wants to know if Mary needs any help. if或whether引导宾语从句时，作“是否”讲。一般情况下，两者常可换用，在口语中多用if。宾语从句ppt课件20 I dont know if he will come, if he comes, please tell me. 这句中两个if 意思是一样的吗？它们是什么意思？ppt课件21if 与whether 在动词不定式之前只能用whether 。 I cant decide whether to stay. 我不能决定是否留下。 I want to
3、 know whether its good news or not . 我想知道是否是好消息。 在whether or not 的固定搭配中。ppt课件22 2 if或whether引导的宾语从句时，用陈述句语序。 3 if或whether引导的宾语从句应和主句的时态保持一致。ppt课件23 His father is worried about whether he lose his work . 他的父亲担心是否会失去工作。 在介词后， 只能用whether。 Whether they can finish the work on time is still a problem . 他们
4、是否能准时完成这项工作还是个问题。 宾语从句放在句首表示强调时，只能用whether 。 ppt课件24 Could you tell me if you know the answer ? 这句话有两种意思：“你能告诉我是否知道答案吗？”或“如果你知道答案，请告诉我，好吗？”。如用whether可避免歧义. 用if会引起歧义时， 只用whether ppt课件25ppt课件26ppt课件27ppt课件28ppt课件30I want to know if you are late. Tell me if you are late.I want to know why you are late. Tell me why you are late.I want to know if you are dirty. Tell me if you are dirty.I want to know why you are dirty. Tell me why you are dirty.I want to know if you are lazy. Tell me if you are lazy.I want to know why you are lazy. Tell me why you are lazy.ppt课件31ppt课件32ppt课件34
