新概念一册139课PPT课件.ppt

新概念一册139课PPT课件 Was John answering the telephone? Yes, he was. The telephone engineer. s , ex tra extra over seas overseas engine er ing com pany company line Unit 70 1 2 3 4 5 6 company 伴侣；朋友 extra adj.额外的 adj. 附加的 extra money line n.线路 v. 画线于；排列；使成行 in line 排成一行 row n. 排 s , 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 I don’t 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？ if 与whether 在动词不定式之前只能用whether 。 I can’t decide whether to stay. 我不能决定是否留下。 I want to know whether it’s good news or not . 我想知道是否是好消息。 在whether …… or not 的固定搭配中。 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。 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 。 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 I 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.