四年级的英语语法思维导图

名词有单数和复数两种形式

名词的单数：表示一个人或一个事物

名词的复数：表示一个人以上的人或事物

名词复数的变化规律如下：

he他 she她 it它 they他、它、她们(复数)

am ，is是 are(复数)

I(主格)"我"-- me (宾格)"我"

主格在陈述句中通常放句首，宾格通常放在动词后或介词后，也就是说宾格，不放在句首。

I have a new car.( I 主格)

Excuse me (me 宾格)

I ask him to go (him 宾格)

They sit in front of me (me 宾格)

主格(8个)：I 我you你 he他 she她 it它 we 我们you 你们they他(她、它)们

宾格(8个)：me我 you你 him 他her她 it它 us我们 you你们 them他(她、它) 们

1、变法：在人名后面加's

2、如果是2个或2个以上人的名词所有格要在最后一个人名加's

3、以s结尾的名词复数所有格在后面加'，students'

把单数的句子成复数的句子很简单：变法是把能变成复数的词变成复数，但a或an要把去掉。特殊疑问词、形容词、国家及地点通常不变。

把下列句子变成复数

1、I have a car we have cars

2、He is an American boy. They are American boys

3、It is a car They are cars

4、This is an eraser These are erasers

5、That is a backpsck Those are backpacks

6、I'm an English teather We are English teathers

7、It's a new shirt They are new shirts

8、He's a boy They are boys

9、She's a singer They are singers

10、What's this in English? What are these in English?

就划线部分提问的变法：

1、一般疑问句最基本的变法：be 提前 用问号 读升调

2、my变成your our变成your I am / We are 变Are you I can 变Can you

3、注意人名不论放在什么位置都要大写 Tom is a student。Is Tom a student?

4、一般疑问句翻译成汉语都有"吗"?

1.名词性物主代词和形容词性物主代词一样有8个：Mine yours his hers its ours yours theirs

2. 名词性物主代词的特点：

3.形容词性物主代词8个：

⑴ am 和is在一般过去时中变为was。(was not=wasn’t)

⑵ are在一般过去时中变为were。(were not=weren’t)

⑶ 带有was或were的句子，其否定、疑问的变化和is, am, 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。

肯定句： 主语+动词过去式? 如： Jim went home yesterday.

否定句： 主语+didn’t +动词原形? 如：Jim didn’t go home yesterday. 一般疑问句： Did+主语+动词原形? 如：Did Jim go home yesterday?

特殊疑问句：⑴疑问词+did+主语+动词原形? 如： What did Jim do yesterday?

⑵疑问词当主语时：疑问词+动词过去式?如：Who went to home yesterday?

动词过去式变化规则：

am, is-was, are-were, do-did, see-saw, get-got, go-went, come-came, have-had, eat-ate, take-took, sing-sang, put-put, make-made, read-read, write-wrote, draw-drew, fly-flew, swim-swam