2015届中考英语总复习：英语语法—连词课件（共25张PPT）.ppt

三者均可译为“在……时候”。when引导的从句，动词既可以是延续性的，也可以是终止性的。一般来说，当主句的动作正在进行时，when引导的从句的动作才发生；while引导的从句中，动词只能是延续性的，一般来说，当while引导的从句的动作正在进行时，主句的动作才发生；若主从句动作同时发生，且强调“一边一边”这样的意思，一般用 as。 When I came into the room, I found him lying there asleep. She sang as she walked. 她一边走一边唱歌。注意：while 可以表示对比关系“然而”。He is short while his brother is tall. * * 连词是一种虚词，它不能独立担任句子成分，主要作用是连接单词与单词、短语与短语、句子与句子。连词可分为两类：并列连词和从属连词。 一、 并列连词 1. Mary likes music___Tom is found of sports. A. and B. but C. both A and B 2. I failed again, ___ I won’t give up. A. and B. but C. so 3. This is my first lesson, __ I don’t know your names. A. and B. but C. so and : 表对等 “和、并且” but: 表转折 “但是” so: 表因果 “所以” and, or, but, so 基本用法 1. Which do you like better, apples, __ pears? A. and B. but C. or 2. Now we have no time _____ money.  A. so B. and C. or or: 1. 用于疑问句, 表选择 2. 用于否定句, 表并列（肯定句用and） 3.Christine, Aileen _____ (和) I are good friends. Study hard, ______ (否则)you’ll fall behind. 4. Are you coming by bus ____(或者) on foot? and or or 1. Try your best __ you’ll make more progress. A. and B. but C. or 2. Don’t lose heart, __ you’ll lose all. A. and B. so C. or and 和 or 都可以在祈使句中使用. and 通常是比较好的结果; or 则表示不愉快或不理想的结果. and, or, but, so 基本用法 1. It’s getting warmer __ warmer. A. and B. but C. or 2. He or the twins __ the USA. A. comes from B. come from C. is from 4. Not Tom but I ___ going to give the talk. A. am B. is C. are adj.比 + and + adj.比 表示越来越… A or B 和 not A but B 结构作主语时，谓语动词要使用就近原则。 and, or, but, so 特殊用法 1. Although I have passed the exam, ___ I am not pleased with the result. A. and B. but C. / and, or, but, so 特殊用法 although 和 but 不能同时出现。 “so+情态动词/助动词/be动词+主语”句型为倒装结构，意思为“…也是如此”，系动词、情态动词或助动词