Unit3-2022-2023学年语法精讲课内知识拓展课后精准练习（人教版）.docx
例如：an apple, a dog, a door, Tom, Cindy, a day 等等。在一般现在时里，当主语是第三人称单数形式的时候，动词要加s或者es.动词变化规则如下：.普通变化，直接加stake-takesbring-bringsmeet-meets(2).以s,x,sh.ch,o结尾的动词加esdress-dresseswatch-watcheswash-washesteach-teachesgo-goesdo-does似辅音字母加y结尾的动词，改y为i再加esstudy-studiescarry-carriestry-tries(4).以元音字母加y结尾的动词，直接加s (元音字母有五个：a, e, i, o, u)play-playsenjoy-enjoyssay-sayspay-pays.特殊变法amjs-arehave-has3.主语+be动词+其他部分She is a doctor.He is a good boy.They are good friends.We are family.一般现在时经常会用到的时间状语：经常，时常/禺尔（按频率从高到低排序）：always, usually,often,sometimeseveryday, every week, every month, every weekend, every yearonce a week 一周一次once a month 一月一次once a year 一年一次twice a week/month/year 一周/月/年两次three times a week/month/year 一周/月/年三次four times a week/month/year 一周/月/年四次专项训练：1 .He dinner every day.A. eatB.ateC.eatsD. eating2 .We often homework at night.A.doB.doesC.doing D.did3 .The earth around the sun.A.runningB.runs C.ran D.run4 .Everything everyday.A.change.B.changing C.changedD.changes5 .The little cat always high.A.jump B.jumpsC.jumpingD.jumped答案解析：1 .c主语he是第三人称单数。2 .A主语是we,第一人称复数，所以动词用原型。3 .B主语是earth,地球，第三人称单数。4 .A这句话的意思事每一天每一件事都会变化，每一个，是单数，第三人称。5 .B小猫是第三人称单数。一般现在时的助动词是do,does1第一人称dowe第一人称doyou第二人称doyou第二人称dohe第三人称doesshe第三人称doesit第三人称doesthey第三人称do其他人称，单数时使用does,复数时使用doo助动词就是帮助一个句子的动词，怎么帮助呢?我们来看这个句子：He usually plays basketball at school.把它变化一般疑问句，就需要在句子开头加上一个帮助它成为疑问句的词，也就是助动词。he是第三人称单数，所以助动词用doesoDoes he usually play basketball at school?当句子中出现助动词do,does的时候，就算主语是第三人称单数，动词也要用原型。我们再试一试Tom often does homework at home.Does Tom often do homework at home?怎么回答呢？Yes, he does./No, he does not.原型缩写形式do notdon'tdoes notdoesn't那么，如果是主语+be动词+其他部分的句子怎么改为一般疑问句?They are family.> Are they family?Yes, they are./No, they are not.当句子中有be动词的时候，改为一般疑问句，直接把be动词提到句子开头就行。原型缩写形式am not没有缩写形式，因为已经够简短了is notisn'tare notaren't专项训练：请把以下句子改为一般疑问句，并且作出肯定，否定的回答。1 .They like listening to the music.2 .He sometimes goes to school by bike.3 .She often draws pictures at home.4 .we usually buy food at the store.5 .Linda makes money by herself.答案解析：1 .Do they like listening to the music? Yes,they do. /No, they don't.2 .Does he sometimes go to school by bike? Yes,he does./No,he doesn't.3 .Does she often draw pictures at home? Yes, she does./No ,she doesn't.4 .Do you usually buy food at the store? Yes,we do./ No, we don't.5 .Does Linda make money by herself? Yes,She does./No,She doesn't.二、关于学习用品的英语铅笔pencil字典dictionary钢笔pen铅笔盒pencil-box毛笔Chinese brush笔袋pen bag圆珠笔ball-point pen练习册exercise book书包schoolbag课本textbook橡皮eraser参考书reference book直尺ruler试卷test paper修正带correction tape笔记本notebook三、指示代词this/hatjthesethose的句型转换This is a pencil.这句话中，谓语动词是is,当句中有be动词的时候，改为一般疑问句，只需要把be动词提 到句子开头。Is this a pencil?这是完全符合语法规则的，当然也可以把this改成that,表示那个东西是什么。肯定回答：Yes, this is. /Yes, that is.否定回答：No,this isn't./No, that isn't.That is a tree.Is that a tree?Yes, that is./ No, that isn't.These are books.Are these books?Those are dictionaries.Are those dictionaries.专项训练：请把下列句子改为一般疑问句。1 .This my schoolbag.2 .These are his notebooks.3 .That is his grandfather.4 .Those are our classmates.答案解析:l.ls this your schoolbag?2.Are these his notebooks?3.1s that his grandfather?4.Are those our classmates?
