你知道be的用法吗
你知道be的用法吗?
Be动词的用法
系动词be
be为连系动词,中心词义是"是",句型为"主+系+表"结构
be的形式 ❶ 现在式 : am, is, are ❷ 过去式 : was,were ❸ 将来式:will+be ❹ 完成式:have/has/had been 例句:I am a student. (一般现在时) I was very busy yesterday. (一般过去时) I will be happy tomorrow. (一般将来时) I have been ill for two days. (现在完成时)
助动词bebe为助动词,无词义,辅助主要动词在句中一起做谓语动词,用法如下 ❶ be +doing 构成进行时态,有现在和过去两种 例句:The girl is reading now. (现在进行时态) He was always asking questions . (过去进行时态)❷be+done 构成被动语态 (主要是动作的承受者, done必须是及物动词) 例句: Tea is grown in my hometown.(现在时的) This building was built three years ago.(过去式的) Our classroom has been cleaned already.(现在完成时的) How could this kind of cakes be made?(含情态动词的) That is a day never to be forgotten.(动词不定式❸ be+going to do 表示打算或将要做某事(be有现在和过去两种形式)
例句:
We are going to plant trees in the park.
(现在)
I didn't know if he was going to come here.
(过去)
❹ be+to do 表示按计划安排将要做某事
例句:The new shop is not to be opened till next Monday.
There be
There be 句式为:There be +主要部分+状语部
表示某处存在某物(be常用现在时,过去时,将来时等)
例句:
There is a book on the desk.
Will there be an football match in your school next week?
实义be
可以将be视为实义动词,因为他具有实际的意义,如:成为;做;举行;发生;逗留;到达等。
例句:
His daughter wants to be a doctor in her twentieth.
Her birthday party will be at half past six this evening.
英语语法顺口溜--be的用法口诀
be的用法口诀
我用am,你用are,
is连着他,她,它;
单数名词用is,
复数名词全用are.
变疑问,往前提,
句末问号莫丢弃
变否定,更容易,
be后not莫忘记
疑问否定任你变,
句首大写莫迟疑。
英语词法」助动词be的用法和作用讲解
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助动词:be
vt. 是;有,存在;做,成为;发生
n. (Be)人名;(缅)拜;(日)部(姓);(朝)培;(中非)贝
1. 后接动词的现在分词,构成动词进行体
eg:This is happening in every school throughout the country.这在全国各校都正在发生。
2. 后接动词的过去分词,构成被动语态
eg:Her husband was killed in a car crash.她丈夫在一场车祸中被夺去了性命。
3. 后接动词不定式,表“安排、注定、必然”等意
eg:The talks are to begin tomorrow.会谈将于明天开始。
4. 后接动词不定式,用于说明或询问特定情况下应该会怎样、怎样做、谁来做等
eg:Who is to say which of them had more power?谁知道他们当中谁有更大权利?
5. (was)和(were)接不定式表示说话时间之后发生的事
eg:He started something that was to change the face of China.他发起了某项后来改变了中国面貌的行动。
6. 后接(seen)、(heard)、(found),表“可见到、可听到、可发现”之意
eg:Little traffic was to be seen on the streets.路上几乎没有车辆可见。
常用词组:
so be it 诚心所愿;顺其自然
let be 听任;不干涉,不打扰
词语辨析:exist, live, be
这组词都有“存在”的意思,其区别是:
exist 通常指可观察到的或众所周知的存在现象。
live 多指有生命的东西的存在。指无生命事物时,强调可联想起生命的那些特点。
be 指某时某地确存在的事物或现象,多与there连用。
语法小课堂:there be 的用法
there be的位置和用法:说明何时何地有,
there be在主语前。
随着主语第一个,
be的形式做变换。
be going to的用法:be going是助动词,
后跟加to不定式。