英语中be动词的用法
1.am 和is在一般过去时中变为was。(was not = wasn’t) 2.are在一般过去时中变为were。(were not = weren’t)
3.带有was或were的句子,其否定、疑问的变化和am,is, are一样,即否定句在was或were后加not,一般疑问句把was或were调到句首
am,is are 都属于be动词,be是他们的原型 be动词的一般现在时有三种形式,即:am, is, are。 1. 如果主语是第一人称I(我)时,be动词用am。 如:I am a student. 我是一名学生。 I am 还可缩写成I'm。如: I'm David. 我是大卫。
2. 如果主语是you (你,你们), they (他们,它们,她们)或名词复数 (两个以上的人或 物)时,be动词必须用are。 如:Are you twelve? 你是十二岁吗?
Tom and Lily are good friends. 汤姆和莉莉是好朋友。 They are at school. 他们在学校。
are与主语还可缩写。如: We are= We're, They are =They're, You are = You're。而are与 not可缩写成aren't。 如:They aren't students. 他们不是学生。但是am与not不能缩写。
3. 如果主语是单数名词、不可数名词或单数第三人称代词(he, she, it)时,be动词用is。 如:My mother is a teacher. 我的妈妈是一名老师。 He is a student. 他是一名学生。
is也可与主语缩写,如: He is = He's, My mother is = My mother's等。但是This is不可缩写。而is与not可缩写成 isn't。 如:This isn't a book. 这不是一本书。
根据以上叙述我们可以把动词的用法以口诀的形式表述出来: 我(I)是am, 你(you)是are,
剩下is留给她(she), 他(he), 它(it), 两个以上都用are。
be动词am,is,are,如何正确使用它。我用am,你用are,is用于他、她、它。以上主语是单数.
复数主语全用are。指示代词作主语,This,that用is,These,those要用are。若是变为否定句,Not系动词后面加。若变一般疑问句,句首A m,Is,Are,句末问号莫忘加。回答一般疑问句,Yes,或N o简回
作为系动词(也叫连系动词,link verb)的be,是英语学习者接触最早的用法,而且其用法也很多。其基本含义为“是”,基本用法结构为“主语 be 表语”,也就是我们常说的主系表结构,其中的表语一般都由名词、形容词、数词或表地点、时间等的短语来充当。
1、be的时态变化
系动词be会有一般现在时、一般过去时、一般将来时、现在完成时、过去完成时等的时态变化。如:
(1)He isa student.
(2)They werein the park yesterday.
2、be与情态动词的连用
其用法为:情态动词 系动词be原形。如:
(1)It must be Lucy's book. Her name is on the cover.
(2)It can be very difficult for us to memorize too many words within such a short time.
拓展资料:
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:
(1)He isgoing to visit us next week.
(2)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.
(1)一般现在时:I am...He/She/It is...
We/They/You are...
例句:You are my best friend.
(2)一般过去时 :I was...He/She/It was...
We/They/You were...
例句:I was ten years old last year.
(3)N在进行时 :Iam doing...He/She/hisdoing...
We/They/You are doing...
例句:I am doing my homework now.
(4)过去进行时 :I was doing...He/She/it was doing...
We/They/You were doing...
例句:You wew going to chool.
(5)一般将来时 :I/He / She/It will be,we will be...
I am going to be...
He/She/it is going to be...
We/They/You are going to be...
例句:I am going to go for a rest.
(6)过去将来时:I/He/She/It/You/They/We would be...
I was goin to be ...
He/She/It was going to be ...
We/They/You were going to be...
例句:They were going to play ball.
(7)现在完成时:I have been...
He/She/It has been...
We/They/You have been...
例句:I have been to tell her.
(8)过去完成时:I had been...
He/She/It had been...
We/They/You had been...
例句:We had been to finish the job.
2、Be动词就是(am,are,is)句子中如果没有实意动词(例如:write,buy)之类的动词,就直接在主语后面加Be动词。而如果是句子中有实意动词,那么如果你要改为一般疑问句,就要借助DO(do也称为助动词),例如:I study.改为一般疑问句:Do you study ?
1、be的时态变化
系动词be会有一般现在时、一般过去时、一般将来时、现在完成时、过去完成时等的时态变化。如:
(1)He isa student.
(2)They werein the park yesterday.
2、be与情态动词的连用
其用法为:情态动词 系动词be原形。如:
(1)It must be Lucy's book. Her name is on the cover.
(2)It can be very difficult for us to memorize too many words within such a short time.
拓展资料:
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:
(1)He isgoing to visit us next week.
(2)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.