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be动词在英语中的用法区别是什么

be是英语动词中比较特殊的一类动词,其使用频率很高,牵涉到各种句型、时态和语态等用法,下面小编告诉你be动词在英语中的用法区别是什么,大家一起来看看吧!
be动词在英语中的用法区别是什么:
一、助动词be
作为助动词,be没有具体含义,而是与主要动词一起构成句子的谓语动词。这种情况下,be主要用来构成进行时和被动语态。
(一)进行时态中的be
此时,be可以与主要动词的现在分词一起,构成各种进行时态。如:
He is reading in the library now. (现在进行时)
She wasswimming in the river this time yesterday. (过去进行时)
They will be arriving in Beijing tomorrow. (将来进行时)
We have been learning English for ten years. (现在完成进行时)
(二)被动语态中的be
助动词be能够与主要动词的过去分词一起构成被动语态,即be done结构。如:
Chinese iswidely used around the world nowadays.
The window wasbroken by the naughty boy just now.
Your watch has already beenrepaired.
be动词在英语中的用法区别是什么
二、特殊句型中的be
(一)There be句型
与上面用法都不同的是,be可以与there一起构成there be句型,用来表示存在。考虑到There be句型较为重要,内容较多,在此不做赘述,后面再找时间跟大家单独分享。今天就先给几个常见的例句。
There is a white ruler on the desk.
There were a great many people in the car race last year.
(二)祈使句中的be
这种情况下,句子一般以Be开头或是Don't be开头,表示命令或建议等。如:
Bepatient! (耐心点!)
Don't be so hard on me! (不要对我们这么严厉!)
(三)虚拟语气中的be
be有时可以放在句首,引起虚拟语气。如:
Be he rich or poor, she will marry him.
Be it true or not, she will see it herself.
此时的be引导的句子其实相当于一个让步状语从句。以上两句话就相当于:
Whether he be rich or poor, she will marry him. (无论他是否有钱,她都会嫁给她。)
Whether it be true or not, she will see it herself. (无论这是否是真的,她都会亲自去见证。)
there being的两个用法:
用法一、there being相当于一个独立主格结构,可在句子中用做状语,表示原因等。如:
(1) There being too many new words, I find the text difficult. 由于生词太多,我认为课文很难。
(2) There being a lot of work to be done, I don’t know what to do. 由于很多事情要做,我不知道该如何是好。
be动词在英语中的用法区别是什么
用法二、相当于一个带有逻辑主语的动词-ing形式。在句子中可做介词(除介词for外) 的宾语。如:
(1) The crops grow well because of there being enough rain this year. 由于今年雨水充足,庄稼长得很好。
(2) Judging from there being no much furniture in the house, we know that they are very poor. 从他家没有什么家具来看,我们知道他们很穷。
there to be的两个用法:
用法一、动词consider, expect, hate, intend, like, mean, prefer, want等可接there to be做宾语。如:
(1) I considered there to be much time for the work. 我原以为有很多时间来做这件工作。
(2) I expect there to be great fun in the game. 我希望游戏中有很大的乐趣。
用法二、做介词for 的宾语。如:
(1) You don’t have to hurry, for there to be much time left. 你不必匆忙,因为还剩有很多时间。
(2) Let’s get off the bus, for there to be too many passengers in it. 我们下车吧,因为车里的乘客将太多了。
有关there be结构的若干句式:
■There is no / some / much / little difficulty / trouble with sth. 做某事(没) 有困难。如:
(1) There is some difficulty with the text. 这篇课文还有点困难。
(2) There is little trouble with the matter. 这件事情没有什么麻烦。
■There is no / some / little / much difficulty / trouble in + doing. 做某事有困难。如:
(1) There is much difficulty in finishing the work in the given time. 在规定的时间内完成这项工作还很困难。
(2) There is no trouble in reading the article without a dictionary. 即使不用词典读这篇文章也不难。
■There is no doubt about / of sth. 毫无疑问…。如:
(1) There is no doubt about his coming here. 毫无疑问,他会来。
(2) There is no doubt of his words. 对他的话毋庸置疑。
■There is no doubt that –clause. 毫无疑问…。如:
(1) There is no doubt that he has made great progress this year. 毫无疑问,他今年进了大步。
(2) There is no doubt that he likes hunting. 毫无疑问,他喜欢狩猎。
■There is no hurry (+ to do sth) 不用急于干某事。如:
(1) There is no hurry to leave, for it is early. 天还早,不要急于离开。
(2) There is no hurry to answer this question, but use your head. 动动脑筋,不要急于回答这个问题。
■There is no need for (sb. to do ) sth. 没有必要怎么样。如:
(1) There is no need for him to go there. 她没有必要去那儿。
(2) There is no need for such a meeting. 没有必要开这样的会议。
■There is no question about sth. 毫无疑问…。如:
(1) There is no question about his arrangement. 对他的安排毋庸置疑。
(2) There is no question about what he said. 对他的话毋庸置疑。
■There is no question of doing sth. 毫无疑问…。如:
(1) There is no question of his leaving for holiday. 他肯定去度假了。
(2) There is no question of his inviting us to his party. 他肯定会邀请我们去参加他的聚会。
■There is no sense in doing sth. 做某事没有道理或说不过去。如:
(1) There is no sense in forcing him to do what he doesn’t like to. 强迫他做他不喜欢做的事情没有道理。
(2) There is no sense in leaving him alone when he is in trouble. 当他遇到困难时,扔下他不管,没有道理。
■There is no point in doing sth. 做某事没有用。如:
(1) There is no point in regretting. 后悔没有用。
(2) There is no point in reasoning with him. 跟他说道理没有用。
■There is no doing sth. 不可能…;无法…。如:
(1) There is no telling who will win the match. 无法断定比赛谁赢。
(2) There is no giving you a reply before deciding it. 在决定前不可能给你答复。
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