【创新设计】2016-2017学年高中英语 Module 2 Developing and Developed Countries Period Three Grammar Writing课件 外研版必修3.ppt

Period Three —— 写作专题 对比类文章 语法专题 表转折及让步关系的连词 栏目索引 语法精析 语法专题 一、表示转折关系的并列连词 1.but but是连词，意为“但是”，用来引出相反意见或不同情况，常用于口语中。如： I’d asked everybody but only two people came. 每个人我都请了，却只来了两个人。 表转折及让步关系的连词 2.however however然而，不过。它的语气比but弱，不直接引出相反的意见，可放于句首和句中，且通常用逗号与句子其他成分隔开。如： You will be lucky if he lets you go without a ticket.However，this does not always happen. 如果他不给你开罚单就让你走，那是你运气好。不过，这种事不是常有的。 I’d like to go with you；however，my hands are full. 我很想和你一块儿去，可是我很忙。 3.while while是连词，意为“却，然而”，表示对比或用于引出相反的情况。如： You like playing tennis，while I like reading. 你爱打网球，而我爱看书。 即时跟踪1 用but，however或while填空 (1)I was going to write you a letter， I lost your address. (2)Schools in the north are well--equipped， those in the south are poor. (3)The plan， ，has proven impractical at all. 答案 but while however 二、表示让步关系的从属连词 1.although与though (1)这两个词意思相同，通常可以换用，但although语气较重，通常放在句首，并用于正式场合。如： I’d quite like to go out，(al)though it is a bit rainy. 虽然天空下着小雨，但我还是很想出去。 Although it is snowing，it is not very cold. 虽然下着雪，但天并不是很冷。 (2)though作“尽管”讲，引导的让步状语从句可以倒装，但although没有这种用法。如： Poor though he is，he is happy. 尽管很穷，但他很开心。 Child though she was，the actress drew wide audiences. 尽管这个女演员还是个孩子，却吸引了大批观众。(child前不用冠词a) (3)although只用作连词，而though除作连词外，还可用作副词，常置于句末；句子较长时，也可置于句中。如： He’s a bad manager.There’s no reason，though，to dismiss him. 他是个差劲的经理，然而还是没有理由免他的职。 (4)although和though用作连词时不能和but连用，但可以和yet，still等连用。如： Although he lives alone，yet he is happy.(＝He lives alone，but he is happy.) 虽然独自生活，但他很开心。 2.while while引导让步状语从句，意为“虽然；尽管”，置于句首。如： While I am willing to help，I do not have much time available. 尽管我愿意帮忙，但是我没有很多时间。 While he likes the big house very much，he can’t afford it. 虽然他很喜欢那所大房子，但他买不起。 3.as as引导的让步状语从句要采用倒装语序。从句结构为：名词/形容词/副词/动词＋as＋主语＋谓语。如： Cold as it was，he went on working. 尽管天气冷，可他仍继续工作。 Fast as you read，you can’t finish the book in three days. 尽管你读得快，你也不可能在三天内读完这本书。 即时跟踪2 用although，though，as或while填空 (1) TV has many benefits，it has some b