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可数名词变复数形式的规则1一般情况（包括元音字母+y结尾的单词），在词尾加-s.d esk---d esks 书桌girl---girls 女孩boy---boys男孩pen---pens钢笔2以-s,-x,-ch,-sh 结尾的词，在词尾加--esbus---buses公交车box--boxes箱子brush--brushes刷子watch--watch手表3以辅音字母加-y结尾的词，变y为i，加-esbaby-babies 婴儿family--families家庭4以-f或-fe结尾的词，变f或fe为v，再加-esknife---knives刀l eaf---l eaves树叶5以辅音字母加-o结尾的词，一般情况（有生命）下，在词尾加-estomato---tomatoes西红柿potato--potatoes马铃薯6可数名词变为复数形式的不规则变化如下：foot---feet脚mouse---mice老鼠goose---geese鹅fish---fish鱼ox---oxen公牛man---men男人woman---women女人child---children孩子Chinese--Chinese中国人d eer---d eer鹿sheep---sheep绵羊同步练习题1.选择填空( )1．I can see three ________ in the zoo.A monkeysB monkeyesC monkey( )2.The pig has four ______. A. foot B. feet C. foots( )3.My two brothers are both ______.A. policemanB. policemansC. policemen( )4.I can see ten _____ in the picture. A. sheep B. dog C. pig ( )5.The _____ has three______.A. boys, watchesB. boy, watchC. boy, watches( )6.Can you see _______on the plate? A. bread B. breads C. breades ( )7.The girl often brushes her_____ before she goes to bed.A. toothB. toothsC. teeth( )8.Mr Black often drink some _________.A. milk B. milks kes ( )9.There are some _____on the floor. A. child B. water C. books ( )10..Lucy will show us some new ____ of hers.A. photoB. photosC. photoes( )11. I drank two ______.A. bottles of waterB. bottle of waterC. bottles of waters( )12.The cat eats two _____last night.A. mousesB. miceC. mouse( )13.I need a pen and some _____. A. books B. desk C. chair ( )14、There on the wall .They are very beautiful.A. are photoesB. are photosC. is a photoD. is photos ( )15. There some in the river.A. is ,fishB. are, fishsC. is, fishsD. are ,fish( )16. There two in the box.A. is watchB. are watchesC. are watchD. is watches( )17. We should clean twice a day.A .our tooth B. our tooths C.teeth D.our teeth( )18.Our _____ room is near the reading room.A.teacherB.teacher’sC.teachers( )19.Tom and Jim are ___.A:friends B:friend C:brother D:sister( )20.How many_____do they have?A:picture B: pictures C:a picture三、用所给的单词的复数的正确形式填空：1> There are three ______(chair) in the classroom.2>These _______(tomato) are red.3>My brother looks after two ______(baby)4> My father likes to eat _______(potato).5>Chinese ______(people)like to eat noodles.6>I have a lot of ______(toy) in my bedroom.7>I help my mother wash ______(dish) in the kitchen.8>I have two ______(pencil-box).9>There are some ______(bus)in the street.10>Peter has eight _____(foot).11>Linda has three _______(tooth).12>There are some ______(child) in the garden.13>My uncle and father are _____(man).14>Tom and King are _____(boy).。
三年级英语下册《单数变复数句型转换》练习班级考号姓名总分把下列单数句改为复数句。
1.That tree is in front of my house.Those trees are in front of my house.2.There is a book on the desk.There are some books on the desk.3.There is a woman near the house.There are some women near the house.4.I’m a student.We are students.5.She is a doctor.They are doctors.6.There is a picture on the wall.There are some pictures on the wall.7.Is there a baby in the room?Arethereanybabiesintheroom?8.HehasaChinesefriend.They have some Chinese friends.9.Is there an apple on the tree?Are there any apples on the tree?10.I have a pen.We have some pens.11.My English teacher has a dress.Our English teachers have some dresses.12.There is a pencil-box in the bag. There are some pencil-boxes in the bag.13.There is a dog in my bedroom.There are some dogs in my bedroom.14.Is there a letter for me?Are there any letters for me?15.This car is Tom’s.These cars are Tom’s.附：参考答案和解析1.That tree is in front of my house.Those trees are in front of my house.答案解析：单数句改为复数句，主要是将主语和谓语等对应改为复数就可以了。
1.一般情况下，直接加s，如：apple-apple s,pig-pig s,book-book s等2.以s、sh、ch、x结尾的名词，加es，如：bus-bus es(公车),class-class es(班级),fish-fish es(此时的fish当“鱼的种类”讲),watch-watch es(手表),box-box es(盒子),fox-fox es(狐狸)3.以元音字母+y结尾的名词，直接加s，如：boy-boy s(男孩),toy-toy s(玩具)4.以辅音字母+y结尾的名词，去y改ies，如：family-famil ie s(家庭),strawberry-strawberr ies(草莓)5.以f或fe结尾的名词，去f或fe改ves，如：wife-wi ves,knife-kni ves,wolf-wol ves (这三个词的记忆口诀---“妻子”拿着“小刀”杀了“狼”)6.以”o"结尾的名词：（1）有生命的，加es，如：potato-potato es,tomato-tomato es,hero-hero es(这三个词的记忆口诀---”英雄“爱吃”土豆“和”西红柿“)（2）无生命的，加s，如：photo-photo s(照片),radio-radio s(收音机)7.将“oo”改为“ee"的名词，如：tooth-t ee th(牙),foot-f ee t(脚),goose-g ee se(鹅)8.单复同形的名词：（1）fish-fish(此时fish当“同类鱼的很多条”讲),sheep-sheep(绵羊),paper-paper(纸),Chinese-Chinese(中国人),Japanese-Japanese(日本人),people-people(peoples表示“民族”)（2）不可数名词，如：water(水),rice(米饭),milk(牛奶),juice(果汁),bread(面包),tea(茶),orange(橙汁)9.不规则变化的名词：（1）man-men,woman-women (记忆方法---“男人”“女人”将a改e) 延伸：policeman-policemen,policewoman-policemen（2）child-child ren（孩子）（3）mouse-mice(老鼠）（4）根据中文意思变化的名词，如：I-we(我-我们),you-you(你-你们),he/she/it-they(他/她/它-他们),this-these(这个-这些),that-those(那个-那些）同学们，快来看看自己做的怎么样吧！写出下列名词的复数形式：I this that watch child photo diary(日记) day(天)foot book dress(连衣裙) tooth sheep box strawberrywolf peach yo-yo(悠悠球) sandwich man womanpaper water juice tea mouseThere are 56 (people)in China.答案：we these those watch es child ren photo s diar ies day sf ee t book s dress es t ee th sheep box es strawberr ieswol ves peach es yo-yo s(悠悠球是“无生命”的，另外含有-符号的词是一个词，因此在结尾加s) sandwich es m e n wom e npaper water juice tea micepeople s(这句话的意思是---“中国有56个民族”)临床输血知识一．输血认识的误区（一）输全血与输成分血1.全血并不全，一旦离开血液循环到体外，就开始发生变化。
1.一般情况下，直接加s，如：apple-apple s,pig-pig s,book-book ss、sh、ch、x结尾的名词，加es，如：bus-bus es(公车),class-class es(班级),fish-fish es(此时的fish当“鱼的种类〞讲),watch-watch es(手表),box-box es(盒子),fox-fox es(狐狸)元音字母+y结尾的名词，直接加s，如：boy-boy s(男孩),toy-toy s(玩具)辅音字母+y结尾的名词，去y改ies，如：family-famil ie s(家庭),strawberry-strawberr ies(草莓)f或fe结尾的名词，去f或fe改ves，如：wife-wi ves,knife-kni ves,wolf-wol ves(这三个词的记忆口诀---“妻子〞拿着“小刀〞杀了“狼〞)〞o"结尾的名词：〔1〕有生命的，加es，如：potato-potato es,tomato-tomato es,hero-hero es(这三个词的记忆口诀---〞英雄“爱吃〞土豆“和〞西红柿“)〔2〕无生命的，加s，如：photo-photo s(照片),radio-radio s(收音机)“oo〞改为“ee"的名词，如：tooth-t ee th(牙),foot-f ee t(脚),goose-g ee se(鹅)8.单复同形的名词：〔1〕fish-fish(此时fish当“同类鱼的很多条〞讲),sheep-sheep(绵羊),paper-paper(纸),Chinese-Chinese(中国人),Japanese-Japanese(日本人),people-people(peoples表示“民族〞)〔2〕不可数名词，如：water(水),rice(米饭),milk(牛奶),juice(果汁),bread(面包),tea(茶),orange(橙汁)9.不规那么变化的名词：〔1〕man-men,woman-women (记忆方法---“男人〞“女人〞将a改e) 延伸：policeman-policemen,policewoman-policemen〔2〕child-child ren〔孩子〕〔3〕mouse-mice(老鼠〕〔4〕根据中文意思变化的名词，如：I-we(我-我们),you-you(你-你们),he/she/it-they(他/她/它-他们),this-these(这个-这些),that-those(那个-那些〕同学们，快来看看自己做的怎么样吧！写出以下名词的复数形式：I this that watch child photo diary(日记) day(天)foot book dress(连衣裙) tooth sheep box strawberrywolf peach yo-yo(悠悠球) sandwich man womanpaper water juice tea mouseThere are 56 (people)in China.答案：we these those watch es child ren photo s diar ies day sf ee t book s dress es t ee th sheep box es strawberr ieswol ves peach es yo-yo s(悠悠球是“无生命〞的，另外含有-符号的词是一个词，因此在结尾加s) sandwich es m e n wom e npaper water juice tea micepeople s(这句话的意思是---“中国有56个民族〞)。
