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七年级上册英语be动词的用法

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2021-08-22|已帮助:1314

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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。下面小编告诉你七年级上册英语be动词的用法,大家一起来看看吧!
七年级上册英语be动词的用法:
(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)
七年级上册英语be动词的用法
(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.
【注意】
助动词be能够构成特殊句型。如:
1、be going to do
be going to do表示“打算或将要”。如:
He isgoing to visit us next week.
It isgoing to rain soon.
2、be about to do
be about to do表示“刚要,即将”。与be going to do表“将要”不同的是,be about to do表示的是说完话后马上就要去做或是短期内马上就要去做。如:
The plane isabout to take off in five minutes' time.
3、be to do
be to do表示“按计划要做”。如:
One night an angel came to Mary and told her that she wasto have this special boy.
The new store isto be opened tomorrow.
there being 结构用法解说:
there being 为 there be 结构的非谓语形式,主要有两种用法,一是用作状语,二是用作介词宾语。
1. 用作状语
there being 结构最主要的功能是用作状语。如:
There being nothing else to do, we went home. 没有别的事可做,我们就回家了。
There being no taxi available, he had to walk home. 由于没有计程车可搭,他只好步行回家。
这类结构有时可与状语从句转换。如:
There being no further business, I declare the meeting closed.=As there is no further business, I declare the meeting closed. 由于没有再要讨论的事了,我宣布散会。
七年级上册英语be动词的用法
2. 用作介词宾语
there being 结构还可用作介词宾语。如:
They planned on there being another meeting. 他们打算再开一次会。
There is now some hope of there being a settlement of the dispute. 现在还有点希望可以解决这次争端。
注意,there being 用作宾语时,不能用作动词的宾语,只能用作介词的宾语,并且这个介词不能是 for
there to be 结构用法详解:
there to be 为 there be 结构的非谓语形式,有两种主要用法,一是用作动词的宾语,二是用作介词 for 的宾语。
1. 用作动词的宾语
可接该结构作宾语的动词不多,常见的有like, prefer, hate, want, mean, intend, expect, consider 等。如:
I don't want there to be any misunderstanding. 我可不希望有任何误解。
Students hate there to be too much homework. 学生讨厌做太多的家庭作业。
I expect there to be a big response to our advertisement. 我预料我们的广告会有很大的反响。
注意,在 let there be 结构中,动词 be 不带 to。如:
Let there be no mistake about it. 不要误解我的意思。
2. 用作介词for的宾语
用作介词宾语一般用 there being,但用作介词 for 的宾语时,要用 there to be。如:
It was too late for there to be any buses. 太晚了,不会有公共汽车了。
They asked for there to be another meeting. 他们要求再开一次会议。
It’s important for there to be a fire escape at he back of the building. 房子后面要有一个安全通道,这很重要。
there be + 名词 + 非谓语动词:
一、其中的非谓语动词为现在分词
在There be sb. doing中,doing为主语所发出的动作,补足说明主语的正在发生的行为或正处的状态。如:
There are some boys playing games on the playground. 有些男孩子在操场上做游戏。
There are many teachers and students reading in the library. 图书馆里有很多老师和学生在看书。
有时,某些瞬间动词go, come, join, leave, die…的doing也可表示主语即将要进行的事情。如:
As the result of pollution, there are some animals dying out. 由于污染,有些动物即将灭绝。
In our school, there are some students going to study abroad this year. 今年,我们学校将有些学生去国外学习。
二、其中的非谓语动词为过去分词
在There be sth. done中,done一般为及物动词,表示主语所承受已经完成的动作或主语的心理所处的一种状态。如:
In this book, there are some texts learnt before. 这本书里,有些课文已在以前学过。
There are still some people interested in this story. 仍然还有很多人对这个故事感兴趣。
三、其中的非谓语动词为不定式
在There be sth. to do中,不定式表示一个还未发生的动作。如:
(1) After the war, there were many things destroyed to rebuild up in the country. 战后,整个国家百废待兴。
(2) There are lots of questions to be discussed in the meeting. 会上有很多要讨论的问题。
注意:当句子主语表示为一般的事情或工作时,不定式的主动形式表被动意义,如句子(1);若句子的主语表示某一特殊或特定的事情或工作时,不定式须用被动形式,如句子(2) 。

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