新加坡国立大学硕士课程时间安排
2024-11-15
更新时间:2024-01-07 20:55:44作者:小编
大家好,今天小编来为大家解答以下的问题,关于英语be动词用法完全词典,英语be动词用法完全词典这个很多人还不知道,现在让我们一起来看看吧!
Be是一种特殊的英语动词,使用频率很高,涉及句型、时态和语态等多种用法。今天,我将和大家分享be动词的各种用法。
首先,系动词be
Be作为连接动词(也叫链接动词),是英语学习者最早的用法,用法也很多。它的基本意义是“是”,基本用法结构是“主语be表语”,也就是我们常说的主家表结构。
一般来说,表语词是表示地点和时间的名词、形容词、数词或短语。
系动词be有各种时态变化,也与情态动词连用。
(一)be的时间变化
系动词be有一般现在时、一般过去时、一般将来时、现在完成时和过去完成时等时态变化。比如:
He isa student.
They werein the park yesterday.
It will be cloudy tomorrow.
He has been ill for six days.
It had been three hours before she left the hat shop.
(二)be和情态动词一起使用
它的用法是:情态动词是动词be的原型。比如:
It must be Lucy's book. Her name is on the cover.
It can be very difficult for us to memorize too many words within such a short time.
She should be here on time tomorrow.
第二,助动词be
作为助动词,be没有特定的意义,但与主动词一起构成句子的谓语动词。在这种情况下,be主要用于构成连续和被动语态。
(A)用进行时态
此时,be可以和主动词的现在分词一起构成各种进行时态。比如:
He is reading in the library now. (present continuous tense)
She was swimming in the river at this time yesterday. (past continuous tense)
They will arrive in Beijing tomorrow. (Future continuous tense)
We have studied English for ten years. (Present perfect continuous tense)
处于被动语态
助动词be可以和主动词的过去分词一起构成被动语态,即be done结构。比如:
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可以构成特殊的句型。比如:
What are you going to do?
将要做的意思是“去或不去”。比如:
He isgoing to visit us next week.
It isgoing to rain soon.
Be about to do sth
即将做的意思是“正要,很快”。与表“将要做”不同的是,“即将做”的意思是说话后马上做或者在短时间内做。比如:
The plane isabout to take off in five minutes' time.
Will do
Be to do的意思是“按计划做”。比如:
One night an angel came to Mary and told her that she wasto have this special boy.
The new store isto be opened tomorrow.
第三,在特殊的句型中
(一)有句型
与上述用法不同,be可以与there构成there be句式,表示存在。考虑到有be句型比较重要,内容也比较多,这里就不赘述了,以后找时间再和大家分享。今天举几个常见的例子。
There is a white ruler on the desk.
There were a great many people in the car race last year.
(B)用祈使句
在这种情况下,句子通常以be或Don't be开头,表示命令或建议。比如:
Be patient! (Be patient! )
不要对我这么苛刻!不要对我们这么苛刻!)
处于虚拟语气
Be有时可以放在句首,引起虚拟语气。比如:
Be he rich or poor, she will marry him.
Be it true or not, she will see it herself.
这时,be引导句实际上相当于一个状语从句。以上两句话相当于:
不管他是穷是富,她都会嫁给他。(不管他有钱没钱,她都要和她结婚。)
不管是真是假,她自己会看出来的。(不管是真是假,她自己会见证的。)
文章到此结束,如果本次分享的英语be动词用法完全词典和英语be动词用法完全词典的问题解决了您的问题,那么我们由衷的感到高兴!