三年级英语知识点汇总（一）人称代词和物主代词一、人称代词二、物主代词形容词性物主代词(my/your/his/her/its/our/their)+名词，而名词性物主代词(mine/yours/his/hers/its/ours/theirs则相当于形容词性物主代词+名词，故其后不必加名词。

如：-Is this your book?-No,it isn’t,it’s hers(her book).(Jim’s，Tom’s，Maria’s )【练习】一、选出括号中正确的词，在正确的词上打勾。

1. This is(my / I)mother.2. Nice to meet(your / you).3.(He / His)name is Mark.4. What’s(she / her)name?5. Excuse(me / my / I).6. Are(your / you)Miss Li?7.(I/ My)am Ben. 8.(She / Her)is my sister.9. Fine , thank(your / you). 10. How old is(he / his)?二、用所给代词的正确形式填空。

1. These are ______ ( he ) brothers.2. That is _______( she ) sister.3. Lily is _______ ( Lucy ) sister.4. Tom, this is _____ ( me ) cousin, Mary.5. Now _____________(her parent)are in America.6. Those __________ ( child ) are _____ ( I ) father’s students.7. Do you know______ ( it ) name?8. Mike and Tom __________ ( be ) friends.9. Thanks for helping ________( I ).10. ______(Ann安)mother is ______(we) teacher.三、单项选择。

( )1. My family ____ a big family. My family ____all here.A. is, isB. are, areC. is, areD. are, is ( )2. This is __________.A. a picture of familyB. a picture of my familyC. a family’s pictureD. a family of my picture ( )3. Let’s __________ good friends.A. beB. areC. isD. am ( )4. Is she your aunt? Yes, __________.A. she’sB. her isC. she isD. he is( )5. Are __________ coats yours?Yes, they are .A. theyB. theseC. thisD. there ( )6. Is that __________ uncle? No, it isn’tA. heB. sheC. herD. hers ( )7. Mrs. Green is __________ grandmother.A. Jim and KateB. Jim and Kate’sC. Jim’s and Kate’sD. Jim and Kates’( )8. Do you know the name _____Mr. Green’s son?A. inB. ofC. onD. or( )9. __________ the great photo of your family.A. thank forB. Thanks forC. Thank forD. thanks for ( )10. Are those your friends?__________.A. Yes, they’reB. No, they areC. Yes, they areD. Yes, those are答案：一.my you His her me you I she you he二.1.his 2.her 3.Lucy’s 4.my 5.her parents 6. children my 7. its 8.are 9. me10. Ann’sour三.CBACB CBBBC（二）名词所有格名词有三个格：主格、宾格和所有格。

名词的所有格通常表示“……的”。

【练习】一选择。

( )1. ----How’s Joy’s skirt?----Her skirt is more beautiful than ________.A.her sister’s and KateB.her sister and KateC.her sister and Kate’sD.her sister’s and Kate’s( )2．This is _______ room. The twin sisters like it very much.A.Lucy’s and Lily’sB.Lucy’s and LilyC.Lucy and Lily’s ( )3．__________ mothers made them have piano lessons.A. Peter and AnneB. Peter’s and Anne’sC. Peter’s and AnneD. Peter and Anne’s( )4．The room on the right is ________.A. herB. sheC. Lucy’sD. Lucy( )5．Where’s your father ? At _________.A. Mr Green’sB. Mr. GreenC. the Mr. Green’s 二填空。

1. __________________________(李明的父母)work in a big hospital.2. This is __________________________________(我妹妹的语文书)3. __________________________________(双胞胎的卧室) are very nice.4. ______________________________(王平和王明的父亲) is a hotel manager.5. Is this ___________________________________(你的好朋友的钢笔) ?6. They are ___________________________________(Peter 和Sam的老师).7. ___________________________(教师节) is on September 10th .8. ___________________________________(学生们的桌椅) are very new.9. We are very happy on ____________________________________(儿童节).10. He is in _________________________________(老师的办公室) now.（三）名词单复数一、专有名词①专有名词是指某个人、某些地方、某样物品专有的名称。

Children’s Day 儿童节②专有名词第一个字母要大写，前面不加冠词a, an , the。

二、单数名词①一般名词，在前面加a ：a book, a computer②元音字母（A、E、I、O、U）开头的名词，在前面加an ：an egg, an orange 【注意】少数例外：an hour, a university（以元音发音为准）三、复数名词（1）规则变化（2）不规则变化四、不可数名词在不可数名词前只能加some（一些），much（许多）。

1、表示液体：water, juice, milk, lemonade, coffee, coke, ink2、表示自然现象：snow, rain, ice3、表示食品类：rice, jam, honey, meat, bread, mutton, beef, tofu, eggplant, pork,chicken, fish, food4、其它类：newspaper, news, homework, housework五、单数句和复数句口诀：单数句子变，变化规则要记住。

名词代词要变化，am, is要变are。

this, that变成啥，these, those来替它。

he, she, it要变啥，全部变they不用怕。

I要变we莫落下，名词后面把s/es加。

名前冠词去掉它，其余成分原样加。

具体注意下面的六要素：1、单数主格人称代词要变成相应的复数主格人称代词，即I → we you → you she, he, it → they。

e.g: She is a girl.→They are girls.2、am, is要变为are。

e.g: I'm a student. →We are students.3、不定冠词a, an要去掉。

e.g: He is a boy. →They are boys.4、普通单数名词要变为复数形式。

e.g: It is a cat. →They are cats.5、指示代词this, that要变为these, those。

e.g: This is a book.→These are books.6、man, woman作定语修饰可数名词时，要在"数"上与被修饰名词保持一致。

但其他名词修饰名词表示"性质"时，不作变化。

e.g: He is a man doctor.→They are men doctors.This is an apple tree.→They are apple trees.【练习】一、请写出下列词的复数形式。

city ________ zoo ________ country ________ tooth ________mouse________ boy ________ car ________ tree ________horse________ bus________ fox ________ branch ________baby________ family________ dish ________ radio________photo________ piano________ knife________ leaf ________life________ thief________ man________ woman________child________ foot________ this________ watch________diary________ day________ book________dress____________sheep________ tea________ box________ strawberry_________ peach________ sandwich________ paper________ juice________ water________ milk________ rice________ people________ CD________ox________ deer________ fish___________二、单项选择。