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1、破折号的用法1.解释前文的内容或发生的原因You must remember one thingalways be polite.你必须记住一件事始终要有礼貌。Dont call her after 8oclock in the eveningshe usually goes to bed fairly early.晚8点之后不要给她打电话（因为）她一般很早睡觉。,破折号的用法2. 在一句话的中间插入解释During my holidayI must be insanei decided to go to work in Irap.放假期间我想我是疯了我居然决定去伊拉克工作。3. 表示讲话的声
2、音中断，延长或迟疑I-I-think -perhaps he is right.You-you will come to my place tomorrow.,破折号的用法4. 表示意思的表达突然出现转折It normally runs perfectly we still have to be careful.它通常能完美地运行我们仍需要小心。5. 对前面所列举的东西进行总结Good lecturers, nice textbooks, advanced facilities everything you need for study.好的讲师；好的教材，高级的设施你学习所需的一切。,破折号
3、的用法同位语常用逗号隔开，破折号可代替逗号。My friend, John Mayer, is a fantastic singer.=My friend John Mayeris a fantastic singer我的朋友约翰梅尔 是个很牛的歌手。,逗号的用法1. 同位语（对前面的名词补充说明）My dog, Allen, is barking at the pig.2. 插入语（引起注意，省略，不影响意思完整）Computers, you know , can beat humans completely in certain areas.你知道的， 计算机在某些领域能完胜人类。,逗号的
4、用法3. 状语或从句位于句首，大多数后有逗号。Anyway, you should thanks everyone you meet in your life.总之， 你应当感谢生活中所遇到的所有人。Crossing the raod, he made it to the conference.穿过马路，他准时出席了会议。When he realized his mistake,he apologized to her sincerely.当他认识到自己的错误时， 他真诚地向她道歉。,逗号的用法4. 分隔句子中的并列成分或结构War, hunger, and flood are horribl
5、e.战争，饥饿何洪水都很可怕。We had a long, hard,but interesting journey.我们的旅途很长且很累，但非常有意思。,逗号的用法5. 分隔句子中的并列成分或结构， 并列句 ：逗号+并列连词War, hunger, and flood are horrible.战争，饥饿何洪水都很可怕。We had a long, hard,but interesting journey.我们的旅途很长且很累，但非常有意思。He is angry now, so dont to bother him.,逗号的用法引出直接引语的动词后有逗号He shouted, “ Dont
6、 move!”He said, “ I dont care.”“ You are a ugly girl,”said Lucy.直接引语在说话者前，且是陈述句，后用逗号。“ I dont care,” he said.,引号的用法用于标出直接引语（引出说话人所说的话）“ we have a lot to do next year,” the product manager said. 产品经理说，我们明天有很多事情要做。He had a lazy strench and then said , “ we will think about it later.”他伸了一个大懒腰，然后说：“ 这是我
7、们稍后会考虑。”,引号的用法用于书名，剧名，文章标题。发言题目等The novel “ War and Peace” was written by Leo Tolstoy.小说 战争与和平 有托尔斯泰所写。引起注意或强调The noun “ machine” is the subject of the sentence.名词“manchine” 是句子的主语,引号的用法表示反语， 讽刺。The “lost” money turned out to be in the safe all the time.“丢掉“ 的钱原来一直就在保险箱里。,分号的用法连接2个独立的，但是有紧密关系的分句。Fra
8、nk wanted to go to the cinema; Betty did not want to go.两个分句，第一个分句用分号， 过渡词后，用逗号。过渡词： however, on the other side, on the contary(相反）Bill went to school; on the contary, Tom stayed at home.,冒号的用法1. 放在引语的前面，与逗号相似。The note on the table said:”I went back home.”2. 用来列举事项The room was full of furniture: a table, a chair, a sofa and a table.3. 冒号后，后面的分句用来解释说明冒号前的分句My mobile phone has disappeared: it was on my desk a moment ago.,