> 唯美句子 > 情态动词有很多句子里后面都加be是什么意思?

情态动词有很多句子里后面都加be是什么意思?

情态动词后+动词原形

be是am, is , are的原形

在含有am, is, are的句子中如果需要用到情态动词,那么am, is, are相应的就要变为be.

在五个基本句型中,主系表结构的句子常常是这样的。

举例:You are right.你是正确的。

You may be right.你也许是正确的。

The bread is fresh.(主系表结构的句子)面包是新鲜的。

The bread may be fresh.这面包也许是新鲜的。

He is reading.他正在读书。

He may be reading.他也许正在读书。

I go abroad.本身句子当中没有am, is , are.因为是主谓宾结构。当面里面加情态动词的时候,只需要所动词go还原就可以了。

你好:要解决的问题是以下

1。 了解五个基本句型

1。主谓结构;2。主谓宾结构;3主谓双宾结构;4。主谓宾补结构;5。主系表结构

2。了解基本时态

1。一般现在时; 2。一般过去时 3. 一般将来时 4.现在进行时 5. 现在完成时

3。了解情态动词的基本用法。

以上几个找老师学一下,以后碰到这样的题目,就永远不会错。

望采纳,谢谢追问

因为原先的英语不是很好,现在上班需要所以自己在学,句子结构方面还没搞清楚。还有一个问题就是I'll certainly be more careful中的will be也是句子的结构么?

追答

嗯,理解得真不错!

I'll=I will或I shall

will 或shall是用于构成一般将来时的助动词。

will或shall后面也是加动词原形。

追问

像may+be may+do 还有上面的will/shall+be/do都是做谓语

追答

帮助构成谓语成份的助动词和动词在一起构成复合谓语。

may +be因为是系动词be,因为是系表结构作谓语,may+be+表语也构成复全谓语

更多追问

be出现在句子中有什么作用

be助词 v.aux. 1.(与动词的现在分词连用,构成各种进行时态)正在...,在...I won't be free this afternoon. I'll be seeing a friend off. 我今天下午没空,我要给朋友送行。

What were you doing from 9 to 11 this morning? 今天上午九点到十一点你在做什么? He is working. 他在工作。

2.(与及物动词的过去分词连用,构成被动语态)被...The problem was solved long ago. 问题早解决了。

It will be discussed tomorrow. 此事将在明天讨论。

3.【旧】(与不及物动词go,come,rise等的过去分词连用,构成完成时)已经...The sun is set. 太阳已经下山。

4.(与动词不定式连用,表示职责、义务、意图、约定、可能性等)应该做...,必须做 ...;预定做...;会做...The President is to visit Japan next week. 总统将于下周访问日本。

You're to do your homework before you watch TV. 你应该做了功课再看电视。

不及物动词 vi. 1.是[L]At that time he was the chair of the department. 当时他是系主任。

I am a teacher and they are my students. 我是老师,他们是我的学生。

She is very young. 她非常年轻。

2.(表示时间、度、量、价值等)是;值;等于[L]The watch is 100 dollars. 这表值一百元。

3.(常用祈使语气或不定式)要,得;成为;变成[L]Be quiet, please. 请安静。

4.(与there连用)有[L]There are a lot of tourists there. 那里有许多观光客。

5.逗留,(继续)呆[L]He will be here all next week. 下周他将一直呆在这儿。

6.在[Q]Tony is in the office. 托尼在办公室里。

7.存在Whatever is has every reason for being. 存在的东西总有其存在的理由。

8.听任If she's sleeping, let her be. 如果她在睡觉,就别惊动她。

be动词 在句子中有什么作用

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”是个特别动词;有些语言,如中文和马来文,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). 【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. 2. Mary's new dresses are colourful. 3. I have been there before. 4. Mother is in the kitchen now. 【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.】“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.

there to be在句子中是什么意思

there to be是there be结构的动词不定式形式。

there be结构除了谓语形式外,还有非谓语形式,即动词不定式形式、动名词形式和现在分词形式。

1. 作介系词宾语时,如果介系词是for,便只能用动词不定式there to be形式。

如果介词不是for,则要用动名词there being结构。

2. 作宾语时,通常用不定式there to be结构,但也要根据实际动词的具体要求,如果动词是感官动词或使役动词let、have、make,则用不带to的不定式,即there be结构。

3. 作主语,通常用动名词there being结构。

4. 在独立主格结构中,用现在分词there being结构。

例如:It was unusual for there to be so few people in the street. (不定式,作主语) Peter was relying on there being another opportunity. (动名词,作介系词宾语)Everyone expects there to be plenty of choice. (不定式,作宾语补语)We don't mind there being a meeting tonight.(动名词,作宾语)There being a bus stop so near the house is a great advantage. (动名词,作主语)There being nothing else to do, they went home. (现在分词,独立主格结构)希望我能帮助你解疑释惑。

怎么理解句子中be to do的含义?

英语句子一般来说是以动词为灵魂的,没有动词就没有灵魂。

be动词没有具体限制意思,她就像足球场上的替补对于,当首发对于有人缺席时去替补。

be动词也一样,当句子中没有其它动词时,就得用它来做替补,和其它的形容词、名词、副词或者介词短语等一起构成谓语。

你说的这个句子正是如此。

因为后面是形容词careful,英语里形容词是不能直接做谓语的。

只有动词才能做谓语,句中没有动词,需要be来替补。

句子的意思是“我当然会更细心。

There be 句型是什么的句子

there be 句型是 英语中的固定搭配 意思是 有 这里有。

be 跟据需要 变换成 is am are 或者过去式 was were 过去分词 been 一、 注意事项: 1 there be 结构中的be 是可以运用各种时态的。

There is going to be a meeting tonight.今晚有个会议。

There was a knock at the door.有人敲门。

There has been a girl waiting for you.有个女孩一直在等你。

There will be rain soon.不久天就要下雨了。

2动词be单复数形式要跟there be之后的真正的主语一致。

并且要根据就近一致原则来变换be 的单复数形式。

如: There is a book on the desk.课桌上有一本书。

How many people are there in the city?这个城市里有多少人口。

There is a pen and two books on the desk.课桌上有一个钢笔和两本书。

There are two books and a pen on the desk. 课桌上有两本书和一个钢笔。

There are some students and a teacher in the classroom. 在教室里有一些学生和一位老师。

There is a teacher and some students in the classroom. 在教室里有一位老师和一些学生。

3 在there be引起的句子结构中,用来修饰主语的不定式主动形式和被动形式均可。

There is no time to lose (= to be lost).时间紧迫。

There is nothing to see (=to be seen).看不见有什么。

There is nothing to do.(=to be done) 无事可做。

二、 结构变形:在there be 结构中还可把be 改变从而使得there be结构有了一些改变具体总结如下: 1 There used/seem/ happen/appear to be 如: There might be snow at night.晚上可能有雪。

There appeared to be nobody willing to help.看来没人愿意帮忙。

There used to be a building here.过去这儿有一座楼房。

There happened to be a man walking by.碰巧有个人在此经过。

There doesn't seem to be much hope.好象没有太大的希望。

2 在there be的 be 前还可以加上各种情态词,如: There must be something wrong.一定有问题。

There ought not to be so many people.不应该有这么多的人。

There might still be hope .可能还有点希望。

3 在there be句型中的be还可以换成其他的动词与there连用,这些词都是表示状态的如:live stand exist remain等或用来描写某事的发生或某人的到达如come, appear, enter, follow, occur等。

There lived a rich man.这以前住着一个富翁。

Then there came a knock at the door.然后有人敲门。

Long, long ago, there lived a king.很久很久以前,有一个国王。

There followed a terrible noise.然后是传来了可怕的声音。

Suddenly there entered a strange man.突然进来了一个奇怪的人。

三、 特殊的表达方式: 1There is no sense in doing 做某事是没有用的,没有意义的 There is no sense in making him angry.跟他生气是没有用的。

There in no sense in going alone. 一个人去是没有好处的。

4 There is no use /good doing 做某事是没有用的,没有必要的 There is no use trying to explain it.解释是没有必要的。

There is no good/use going there. 去那儿是没有好处的。

5 There is no need to do 没有必要做某事 There is no need to worry. 没有必要担心。

There is no need to give him so much money. 根本没有必要给他那么多的钱。

6 There is thought/said/reported to be 人们认为有/据说有/据报道有 There is thought to be an army between in these two countries。

人们认为在这两国之间有一场战争。

There is reported to be a better way to cure cancer. 据报道,找到了一种更好的治疗癌症的方法。

7 There is no doing(口语)不可能……. There is no telling when he will be back.无法知道他什么时候回来。

There is no knowing what he is doing. 无法知道他在做什么。

句子中含be的为什么不可以用am/is/are替换?句子中有些用be有些却...

"Be" is one of 被动词主动语态及被动词态在第一句中,动词speaks表示主语John是动作的执行者,这时就说它为主动语态(Active Voice)。

第二句中的谓语 is spoken表示主语 English是动作的承受者,因此就说它处于被动语态(Passive Voice)。

当主动结构的句子变为被动结构的句子时,有3个成分受到影响:主动语态的动词(如speaks)成为被动语态的动词: be+过去分词(如is spoken);主动结构中的宾语(如第一句中的English)成为被动结构中的主语(如第二句中的English);主动结构中的主语(如第一句中的John)变成被动结构句子中by的宾语(如第二句中的John)。

下面是几对主动结构和被动结构的句子:1.Columbus discovered America.(主动)2.America was discovered by Columbus.(被动)1.The cat has eaten the fish.(主动)2.The fish has been eaten by the cat.(被动)1.Some one of us will do it.(主动)2.It will be done by some one of us.(被动)不过,由于被动语态的主要作用是不提主动结构句子中的主语(其理由下面再谈),因此在变为被动结构之后,由by 引起的短语常不出现。

例如,我们说 English isspoken in England.而不说 English is spoken in Englandby them 。

从以上所说看来,He teaches和 He is taught是不同的,而John murdered和John was murdered也是不同的。