英语七年级一二单元知识（七年级英语2单元知识）

Unit 2 This is my sister

重点单词

Sister,mother,father,parent,brother,grandfather,grandmother,grandparent,family,those,who,these,hey,well,have,day,bye,son,cousin,grandpa,mom,aunt,grandma,uncle,dad,here,daughter,photo,of,next,picture,girl,dog

重点句型

1.-This/That is my sister/brother/father/mother/son/…… 单数

-These/those are my sisters/brothers/…… 复数

2.-Who is he/she ? 单数

-He/She is my mom/my dad/my brother/my sister/my grandma/grandpa……

3.-Who are these/those? 复数

-They are my my sisters/brothers/……

4.-Is he/she your sister? 单数

-Yes,he/she is. /No, he/she isn’t.

5.-Are these/those your sisters? 复数

-Yes, they are. / No, they aren’t.

6.Tom: Jhon, this is my sister, Mike. Mike, this is my friend.

Jhon: Nice to meet you!

Mike: Nice to meet you, too.

语法

一、指示代词：this, that, these, those

单数：this: “这个，这”指近处或距离说话人较近的人或物。

that: “那个，那”指远处或距离说话人较远的人或物。

复数：these: “这些”指近处或距离说话人较近的人或物。

those: “那些”指远处或距离说话人较远的人或物。

二、将单数形式的句子变为复数形式的句子

1.指示代词的变化：this→these, that→those

2.人称代词的变化：I→we; you不变；he/she/it→they

3.be动词的变化：am/is→are

4.可数名词的变化：

单数变复数的规则变化

(1)一般情况下在词尾加-s；

(2)以s, x, sh, ch结尾的加-es；

(3)以o结尾的加-s或-es;

-s: photos/radios/pianos/zoos/bamboos/kilos

-es: tomatoes/potatoes/……

(4)以f或fe结尾的变f/fe→v es, （屋顶roofs,信念beliefs,首领chiefs除外。）

knife→knives shelf→shelves

(5)以“辅音字母 y”结尾的变y→i es

不规则变化：

(1)单复数同形：sheep绵羊，deer鹿，means手段

(2)变元音：man→men, foot→feet, tooth→teeth

(3)变词尾：child→children, ox→oxen, mouse→mice

(4)只有复数的名词：congratulations, clothes, glasses, surroundings, goods, shorts, thanks, trousers, wishes

(5)单复数意思不一致：glass玻璃，glasses眼镜；water水，waters水域；people人民，peoples民族；force力量，forces部队；arm胳膊，arms武器；……

三、人称代词的用法：he,she,it,I,they,we,you

1 与be动词的搭配：I→am, he/she/it→is, you/we/they→are

2 独立作主语时习惯用宾格：me，you，him，her，it，us，you，them

-I like bananas.-Me too.

3 并列作主语的顺序：

单数：你you,她she/他he,我I 二三一

复数：我们we,你们you,他们they 一二三

欢迎关注微信公众号 ：中学高分宝典

,