Be动词和助动词要如何区分 用法是怎样的

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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,i

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.  
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