首页 - 评论 > 英语句子成分和英语句子结构讲解(怎样区分be动词和实意动词)

英语句子成分和英语句子结构讲解(怎样区分be动词和实意动词)

发布于：2023-12-11 09:28:08 来源：互联网

关于be动词、情态动词和实义动词的区别

新人教版英语七年级上册复习资料

到目前为止,我们主要学习了三类动词:be动词、情态动词和实义动词。下面我们分别来讲一下它们得用法。

1.be动词属于系动词,在一般现在时态的句子中主要表现为三种形式:am is、are。后面往往接

形容词或名词做表语。如:

(1)I’m strong. (strong形容词做表语)

(2)He is a boy.( a boy名词做表语)

含有be动词的句子在进行否定、疑问句变化时,都要在be动词上变化。

(1)变为否定句:主语+be+ not+其他。即,直接在be后not.

①I’m a Chinese girl.(变为否定句)

②You are right. (变为否定句)

③He is strict with me. (变为否定句)

④She is from America. (变为否定句)

以上四个句子中都含有am、is或are,变否定句时,直接在am 、is、are后面加上not.

即:

①I’m not a Chinese girl.

②You are not right.

③He is not strict with me.

④She is not from America.

(2)变为一般疑问句:Be+主语+其他?即把be动词提到主语的前面。注意:当肯定句主语为第

一人称I和We时,变一般疑问句要变为第二人称,be动词也要相应的变为are.同样肯定句中的my和our 也要变为your.

①I am a worker. (变为一般疑问句)

→Are you a worker?

②We are good friends. (变为一般疑问句)

→Are you good friends?

③She is from Japan. (变为一般疑问句)

→Is she from Japan?

④He is strict with me. (变为一般疑问句)

→Is he strict with me?

(3)变特殊疑问句:一般的要求为“对划线部分提问”,即用特殊疑问词代替划线的部分,后接省略

划线部分的一般疑问句(一般不再出现划线部分)。如:

①I’m well(not bad).(对划线部分提问)

→How are you?

②She is from America. (对划线部分提问)

→Where is she from?

2、关于情态动词:初中我们常用的情态动词主要有:can、may、must、need。我们这里主要

以can为例来说明情态动词的用法。情态动词后面必须接动词的原形。情态动词can的用法类似于be动词。不论主语为第几人称,变否定就是在can后加not.变疑问就是把can提到句子前面,它没有人称和数的变化。

(1)变否定句:主语+can +not+ 其他。

①I can spell my name.(变否定句)

→I can not(can’t)spell my name.

②He can dance. (变否定句)

→He can’t dance.

(2)变一般疑问句:Can + 主语+ 其他?即直接把can提到句首。

①I can spell my name.(变为一般疑问句)

→Can you spell your name?

②He can sing.(变为一般疑问句)

→Can he sing?

(3)变特殊疑问句:特殊疑问词+一般疑问句?

①I can spell my name. (对划线部分提问)

→What can you spell?

②He can play the piano. (对划线部分提问)

→Who can play the piano?

3、实义动词,也叫行为动词。就我们现在所学的内容来讲,实义动词所在的句子中一般不存在

be动词。也就是在含有实义动词的句子变否定句或疑问句时,一定不能用be动词。那么,实义动词究竟怎样用呢?正如be动词随着主语的变化可变为am、is、are一样,在一般现在时态的句子中,实义动词在肯定句中,也要随着主语的变化而变化。当主语为第三人称单数he,she, it 时,实义动词要变为相应的第三称单数;当主语为非第三人称单数I, you(你), we,you(你们) they 时,实义动词要用动词的原形。而在变否定句和疑问句时,不能直接在动词上变,而是要借助另一类动词:助动词do、does。

(1)肯定句:

①I have a blue pen.

②He has a brother.

③ She wants to be an actor.

④ They like to play football.

(2)否定句:主语+don’t/doesn’t+动词原形。其中do/does为助动词,是来帮助实义动词构成

否定或疑问句的,但加了do/does后,其后面的动词必须用动词原形。

①I have a blue book.(变为否定句)

→I don’t have a blue book.

②He has a brother. (变为否定句)

→He doesn’t have

③She wants to be a teacher.(变为否定句)

→She doesn’t want to be a teacher.

④They like to play basketball.(变为否定句)

→They don’t like to play basketball.

(3)一般疑问句:Do/Does +主语+动词原形+其他?句中加了do/does后,其后面的动词还是

必须用动词原形。

①I have a blue backpack.(变为一般疑问句)

→Do you have a blue backpack?

②He has a sister. (变为一般疑问句)

→Does he have a sister?

③My brother does his homework before supper. (变为一般疑问句)

→Does your brother do his homework before supper?

④She wants to be a teacher. (变为一般疑问句)

→Does she want to be a teacher?

⑤They like to play basketball. (变为一般疑问句)

→Do they like to play basketball?

(4)特殊疑问句:特殊疑问词+一般疑问句?

① Your sister likes English best because it’s interesting. (对划线部分提问)

→Why does your sister like English best?

② He does his homework before supper. (对划线部分提问)

→When does he do his homework?

注意:当含有and引导的短语在句中做谓语或宾语,我们把这类句子变否定句时,必须把and变为or.如:

(1)He can swim and dance. (变为否定句)

→He can’t swim or dance.

(2)My father likes English and math. (变为否定句)

→My father doesn’t like English or math.

郑重声明：本文版权归原作者所有，转载文章仅为传播更多信息之目的，如有侵权行为，请第一时间联系我们修改或删除，多谢。

相关文章

网站地图|关于我们|联系我们|广告合作|会员服务|

本站部分文字及图片均来自于网络，如有侵权请及时联系删除处理

Copyright © 2021 欧洲网版权所有