be动词的用法
?be动词的用法
【学习目标】
1学习并且掌握be动词am ,are ,is. 2学会使用be动词。
3. 掌握be动词的缩写形式及读音。
任何一个句子一定由主语
(Subject,简写成S)及动词
(Verb,简写成V)构成。 be动词不是动作,它通常与名词、形容
词或其它词类一起
示主语的
性质、状态、身份、特点等等。
一、现在时be动词有三种,即:
am, are,is。?1. 如果主语是只用于
第一人称I(我)时。I am 还可缩写成I'm。而am与not 不缩写。如:I am a student. 我是一名学
生。I am ten years old.我今年十
岁。I am not a bad boy.
?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。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.They aren’t twins(双胞胎). 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。?3. 如果主语是单数名词(单个人名、地名、称呼)、不可数名词、或单数
第三人称代词(he, she, it)时,be动词用is。is也可与主语缩写,如: He is = He's, My mother is = My mothers
等。但是This is不可缩写。而is与 not可缩成 isn'tHe isnt a teacher.他不是一名老师。
如:My mother is a teacher.我的妈妈
是一名老 师。
Jane is a good girl. Shenzhen is beautiful.深圳很美丽。※Be动词用法的口诀:我用am,你用are,is于 he(他),she(她),it(它),单数名词、包括不可数名词用is,we(我们),you(你们),they(他们)及复数(两人以上)都用are。二、句中含有be动词的陈述句变一般疑问句把be动词提到句首,be动词要变大写。注意:第一人称变第二人称,回答时与其他一般疑问句一样,也用yes或no表示。结构:Yes,主语+be动词.No,主语+be+ not。I am…变为Are you…my变为your. 例:I am a student.?
Are you a student? 回答
Yes,I am. No,I am not. That is a watch.Is that a watch?
回答:Yes,it is.No,it isn’t. He is a good boy.?
Is he a good boy?回答:Yes,he is.No,he isn’
t.There is a pen on the desk.s there a pen on the desk.回答: Yes,there is .No,there isn’t. Am I right? 回答:
Yes, you are. No, you are not. (No, you aren’t.)三、 句中含有be动词的肯定陈述句变成否定句先找肯定陈述句中的be动词,在be动词后加not. This is an apple.?This isn’
t an apple. There is a pen and two books on the desk.? There isn’t a pen and two books on the desk. 四、 特殊疑问句:结构:疑问词+一般疑问句。 认识疑问词 What 什么 Where在哪里How many多少(后面加名词复数)Who 谁When什么时候What time 几点钟Whose 谁的How old 多少岁 My name is Jane.?What is your name? It’s on the desk.? Where is my pencil-box? 四、be动词的缩写形式:
1(I’m = I am.否定句:I am not a worker..( am not
没有缩写形式) 2(It’s =It is. He‘s = He is. She’s= She is. Sam’s a student. that’
s= that isWho’s = Who is Where’s= Where is . What’s= What is.Sam’s = Sam is 3(You’re= You are. We‘re= We are. They’re= They are. 4(there’s= there is +名词单数 there’re=there are+ 名词复数 5.否定:isn’
t=is notaren’t= are not(有be动词的否定句就在be动词后面直接加not)6. don’t= do notdoesn’t=does nothasn’t=has nothavent= have not can’t= can not 【Practice in class】