Be动词和助动词要如何区分 用法是怎样的
来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/06 04:14:27
Be动词和助动词要如何区分 用法是怎样的
Be动词和助动词要如何区分 用法是怎样的
Be动词和助动词要如何区分 用法是怎样的
be动词的意思
be动词意思和用法很多,一般的意思是是,此种用法,有多种变化形式,is,am,are,was,were,being,been,to be.另外,be动词还有成为的意思.
be动词的用法
be (be/is/are/am/was/were) [bi:] vi 现在时 I am, you are, he is, we are, you are, they are (缩略式 I'm, you're, he's, we're, you're, they're), (否定缩略式 I'm not, isn't, aren't), 过去时 I was, you were, he was, we were, you were, they were (过去时否定缩略式 wasn't, weren't), 过去分词 been, 现在分词 being 英语的“be”是个特殊动词;有些语言,如马来文等,并没有“be”这样的动词. “Be”除了原形的“be”之外,还有另外七种形式:am, is, are, been, being, was, were. 在句子中,“be”可以是主动词(The Principal Verb)或助动词(The Auxiliary Verb)编辑本段例句对照
【当主动词时,“be”在性质上属于接系动词(The Linking Verb), 后面要有名词、形容词、地方副词或短语作补足语(The Complement).例如: 1. The man is a science teacher. 这个男子是一位科学教师 2. Mary's new dresses are colourful. 玛丽的新衣服色彩鲜艳 3. I have been there before. 我以前去过那里 4. My mother is watching TV in the room. 母亲现在在客厅看电视 【这四个都是陈述句,可以变成疑问句,方法简单,把主语和“be”或助动词对换位置即可: 5. Is the man a science teacher? 6. Are Mary's new dresses colourful? 7. Have I been there before? 8. Is mother in the kitchen now? 【当“be”要在祈使句中出现时,它必须借重助动词“do”或“don't”之助,如: 9. Don't be silly! 10. Do be obedient! 11. Don't be a fool! 【“Be”有两种缩写法,如下: 12. He's not./He isn't. 13. You're not./You aren't... 【但“am + not”的缩写法只有一个: 14. I'm not. 有人用“ain't”, 但这并不是标准英语. 谈过了“be”作主动词的功能,现在看看“be”作助动词时,有些什么用法: 【1.】“Be + 现在分词”以组成进行式时态(Continuous Tenses),如: 15. Tony's maid is washing his new car. 16. The children are playing in the field. 17. Samuel was eating when I came in. 18. We have been living here since 1959. 【2.】“情态动词+Be + 过去分词”以组成被动语态(The Passive Voice),如: 19. Her money in the drawer was stolen. 20. A number of good jobs are taken up byforeigners. 21. David studied in Taiwan but has been trained as a language lecturer in America. 22. Can all the wonderful birds be found in our Bird Park? 23. The disobedient boy was told to stand out- side the classroom. 24. Steps are being taken to reduce traffic con- gestion during peak hours. 25. Dishonest students will be immediately dealt with.
定义
助动词协助主要动词完成以下功用,可以用来: a. 表示时态,例如: He is singing. 他在唱歌. He was got married. 他已结婚. b. 表示语态,例如: He was sent to England. 他被派往英国. c. 构成疑问句,例如: Do you like college life? 你喜欢大学生活吗? Did you study English before you came here? 你来这儿之前学过英语吗? d. 与否定副词not合用,构成否定句,例如: I don't like him. 我不喜欢他. e. 加强语气,例如: Do come to the party tomorrow evening. 明天晚上一定来参加晚会. He did know that. 他的确知道那件事. 3) 最常用的助动词有:be, have, do, shall, will, should, would编辑本段be动词am,is,are的用法
§1) am,is,are +现在分词,构成进行时态,例如: They are having a meeting. 他们正在开会. English is becoming more and more important. 英语现在越来越重要. 2) am,is,are + 过去分词,构成被动语态,例如: The window was broken by Tom.. 窗户是汤姆打碎的. English is taught throughout the world. 世界各地都教英语. 3)am,is,are+ 动词不定式,可表示下列内容: a. 用现在时表示最近、未来的计划或安排,例如: He is to go to New York next week.. 他下周要去纽约. We are to teach the freshpersons. 我们要教新生. 说明: 这种用法也可以说成是一种将来时态表达法. b. 表示命令,例如: You are to explain this. 对此你要做出解释. He is to come to the office this afternoon. 要他今天下午来办公室. c. 征求意见,例如: How am I to answer him? 我该怎样答复他? Who is to go there? 谁该去那儿呢? d. 表示相约、商定,例如: We are to meet at the school gate at seven tomorrow morning. 我们明天早晨7点在校门口集合.编辑本段助动词have的用法
1)have +过去分词,构成完成时态,例: He has left for London. 他已去了伦敦. By the end of last month, they had finished half of their work. 上月未为止,他们已经完成工作的一半. 2)have + been +现在分词,构成完成进行时(正在完成时),例: I have been studying English for ten years. 我一直在学英语,已达十年之久. 3)have+been +过去分词,构成完成时态的被动语态,例: English has been taught in China for many years. 中国教英语已经多年. 助动词do 的用法
be动词am is are的用法
1) 构成一般疑问句,例如: Do you want to pass the CET? 你想通过大学英语测试吗? Did you study German? 你们学过德语吗? 2) do + not 构成否定句,例如: I do not want to be criticized. 我不想挨批评. He doesn't like to study. 他不想学习. In the past, many students did not know the importance of English. 过去,好多学生不知道英语的重要性. 3) 构成否定祈使句,例如: Don't go there. 不要去那里. Don't be so absent-minded. 不要这么心不在焉. 说明: 构成否定祈使句只用do,不用did和does. 4) 放在动词原形前,加强该动词的语气,例如: Do come to my birthday party please. 请一定来参加我的生日宴会. I did go there. 我确实去那儿了. I do miss you. 我确实想你.我真想你了! 5) 用于倒装句,例如: Never did I hear of such a thing. 我从未听说过这样的事情. Only when we begin our college life do we realize the importance of English. 只有在开始大学生活时我们才认识到英语的重要性. 说明: 引导此类倒装句的副词有never, seldom, rarely, little, only, so, well等. 6) 用作代动词,例如: ---- Do you like Beijing? --你喜欢北京吗? ---- Yes, I do. --是的,喜欢.(do用作代动词,代替like Beijing.) He knows how to drive a car, doesn't he? 他知道如何开车,对吧?编辑本段助动词shall和will的用法
shall和will作为助动词可以与动词原形一起构成一般将来时,例如: I shall study harder at English. 我将更加努力地学习英语. He will go to Shanghai. 他要去上海. 说明: 在过去的语法中,语法学家说shall用于第一人称,will 只用于第二、第三人称.现在,尤其是在口语中,will常用于第一人称,但shall只用于第一人称,如用于第二、第三人称,就失去助动词的意义,已变为情态动词,试比较: He shall come. 他必须来.(shall有命令的意味.) He will come. 他要来.(will只与动词原形构成一般将来时.) shall在疑问句中,用于第一,第三人称,征求对方意愿 shall I turn on the light? 要开灯吗?( 我把灯打开好吗?) shall he come to see you? 他要不要来看你 (比较: will he come to see you? 他会不会来看你) shall 用在陈述句, 与第二第三人称连用, 变为情态动词 表示允诺,命令,警告,和说话人的决心等编辑本段助动词should,would的用法
1)should无词义,只是shall的过去形式,与动词原形构成过去将来时,只用于第一人称,例如: I telephoned him yesterday to ask what I should do next week. 我昨天给他打电话,问他我下周干什么. 比较: "What shall I do next week?" I asked. "我下周干什么?"我问道.(可以说,shall变成直接引语时,变成了should.) 2) would也无词义,是will的过去形式,与动词原形构成过去将来时,用于第二、第三人称,例如: He said he would come. 他说他要来. 比较: "I will go," he said. 他说:"我要去那儿." 变成间接引语,就成了: He said he would come. 原来的will变成would,go变成了come..过去式从原来的go变为came.
希望答案对你有帮助^_^