爱查查成语大全提供成语解释、出处、成语谜语、成语故事大全、成语接龙、近义词、反义词等查询

英语作文大全

一般现在时的否定句结构详解

  一般现在时的结构是由动词原形构成的。根据人称的变化,谓语动词有单、复数的变化。它可以表示经常的、现在的、过去的、将来的动作。先来和英语作文啦(www.)小编一起看一下一般现在时的否定句结构吧!

  一般现在时的否定句

  一、一般现在时变否定句的规则.

  一)、主语+be动词

  含有 am is are 的句子,变否定句时,只需在am is are 后加not.

  【例】1、 This is a book. 否定句 This is not a book .

  2、 I am a teacher . 否定句I am not a teacher .

  3、 These are pens . 否定句These are not pens .

  二)、主语+实义动词

  含有实义动词的句子,变否定句分两种。

  1、如果主语是第三人称单数时,要在实义动词前加doesn't,后面的动词用原形。

  【例】1、He eats an apple. 否定句 He doesn't eat an apple.

  2、Jim does his homework. 否定句 Jim doesn't do his homework.

  3、 Marry goes to school. 否定句Marry doesn't go to school.

  2、 如果主语不是第三人称单数时,只需在实义动词前加don't.

  【例】1、 I teach English. 否定句 I don't teach English.

  2、 否定句

  3 、 否定句

  三)、主语+情态动词

  含有情态动词的句子,变否定句时, 只需在情态动词后加not.

  【例】1、 I can dance. 否定句 I can not dance. 或 I can't dance.

  2、They can speak English. 否定句 They can not speak English. 或They can't speak English.

  3、 否定句

  或 He mustn't go home.

  【注意】

  1、 He must be on the playground. He can not be on the playground. 析:当must be用来表示推测,有“一定”的含义时, 否定式要用can not.

  2、 You must say something at the mecting.

  You needn’t say anything at the mecting.

  析:当“must+行为动词”用来表示“必须”的含义时,其否定式可用

  needn’t 或mustn't表示“不需要”,“不必”, 语气委婉,must not表示“禁止”,“千万别”语气生硬。

  3、You may come in now. You mustn't come in now.

  析:may作为情态动词表示“可以”时, 其否定式用must not,而不用

  may not.

  四)、注意

  1、含有have和has的句子变成否定句

  have和has,变否定句不能在have和has后加not,则需要助动词来帮助解决。

  have→do not have或don’t have

  has→does

  http://www.wenku1.coM/news/18168E51BBBD8992.html

  not have或doesn’t have (has要变成have)

  【例】1、I have a pen. 否定句I don’t have a pen。

  2、My father has a watch. 否定句 My father doesn't have a watch.

  2、见到some 变否定句时,要换成any.

  【例】1、I eat some apples. 否定句 I don't eat any apples.

  2、 He has some books. 否定句 He doesn't have any books.

  3、 He does his home work. 否定句 He doesn't do his home work.

  3、见到and 变否定句时,要换成or.

  【例】1、There is some air and water on the moon.

  否定句 There isn't any air or water on the moon.

  2、He has some brothers and sisters.

  否定句 He hasn't any brothers or sisters.

  3、 He eats apples and oranges.

  否定句He doesn’t eat apples or oranges.

  4、见到too和also变否定句时,要换成either.

  too和also用于肯定句中时,否定句中用either替换。

  【例】1、Tom goes to school too.

  否定句 Tom doesn’t go to school either.

  5、a lot of (=lots of)变为many或much。

  【例】 They have a lot of friends.(可数名词)

  否定句They don't have many friends.

  There is lots of orange in the bottle.(不可数名词)

  否定句There isn't much orange in the bottle.

  6、见到already变否定句时,要换成yet。

  【例】1、He has had supper already.

  否定句 He hasn’t had supper yet.

  以上是小编为大家整理的一般现在时的否定句结构,掌握基本结构之后做题就很顺利了,希望各位同学学完此结构之后多加练习,巩固自己的学习。

相关英文作文: 小学一年级英语作文 :Children's Day儿童节晚餐 Dinner on Children's DayI Must Finish My Homework 我一定要完成作业我一定要完成作业 I Must Finish My Homework我的钢琴老师 My Piano Teacher可爱的熊猫 Lovely Panda小学二年级英语作文:A diary of My Birthday年轻有才的人 The Young Talents英语作文:运动会 Sports Meeting英语二年级作文:来自姚明的影响

标签:一般现在否定句结构详解

热门成语

  • 匪夷所思  匪:不是;夷:平常。指言谈行动离奇古怪,不是一般人根据常情所能想象的。
  • 分我杯羹  羹:肉汁。楚、汉相争时,刘邦答项羽的话。比喻从别人那里分享一分利益。
  • 风不鸣条  和风轻拂,树枝不发出声响。比喻社会安定。
  • 匪夷匪惠  夷:殷末周初的伯夷;惠:春秋时鲁国的柳下惠。既不是伯夷,又不是柳下惠;不具备这两位贤人的品德。形容才德不高而又驾驭的人。
  • 安分知足  安于本分,对自己所得到的待遇知道满足。
  • 白华之怨  指女子失宠之哀怨。
  • 备而不用  准备好了,以备急用,眼下暂存不用。
  • 分毫不爽  比喻没有丝毫差错。
  • 比翼连枝  比翼:鸟名。传说此鸟一目一翼,须两两齐飞。比喻夫妇亲密不离。
  • 挨肩擦背  形容人多拥挤。
  • 飞黄腾达  飞黄:传说中神马名;腾达:上升,引伸为发迹,宦途得意。形容骏马奔腾飞驰。比喻骤然得志,官职升得很快。
  • 补苴罅漏  苴:鞋底的草垫;罅:缝隙。补好裂缝,堵住漏洞。比喻弥补事物的缺陷。
  • 肥马轻裘  裘:皮衣。骑肥壮的马,穿轻暖的皮衣。形容阔绰。
  • 不打自招  旧指没有用刑就招供。比喻做了坏事或有坏的意图自我暴露出来。
  • 飞蛾投火  象蛾子扑火一样。比喻自找死路、自取灭亡。