八年级上册英语第二单元unit2知识点及练习题

一、单元核心词汇与短语在开始深入语法之前，我们先来回顾本单元一些核心的词汇和短语。这些词汇是理解和表达的基础，务必熟练掌握。1.关于日常活动的动词及短语：*`dohomework`(做作业)*`watchTV`(看电视)*`exercise`(锻炼；运动)*`readbooks`(看书)*`goshopping`(去购物)*`cleantheroom`(打扫房间)*`helpwithhousework`(帮忙做家务)*`visitgrandparents`(看望祖父母/外祖父母)*`gotothemovies`(去看电影)2.频度副词：这是本单元的重中之重，表示动作发生的频率。*`always`(总是，100%)*`usually`(通常，约80%)*`often`(经常，约60%)*`sometimes`(有时，约40%)*`hardlyever`(几乎不，约5%)*`never`(从不，0%)*`seldom`(很少，比`hardlyever`频率略高一点，但在初中阶段常与`hardlyever`用法相近)3.其他重要词汇：*`howoften`(多久一次)*`once`(一次)*`twice`(两次)*`time`(次；时间)*`week`(周；星期)*`month`(月)*`free`(空闲的)*`maybe`(大概；或许)*`atleast`(至少)*`junkfood`(垃圾食品)*`healthy`(健康的)*`unhealthy`(不健康的)*`habit`(习惯)二、核心句型与语法点1.如何询问和回答动作发生的频率核心句型：*问句：`Howoftendo/does+主语+动词原形+其他?`*例：`Howoftendoyouexercise?`(你多久锻炼一次？)*例：`HowoftendoeshewatchTV?`(他多久看一次电视？)*答句：*用频度副词回答：`主语+频度副词+动词原形/三单+其他.`*例：`Iusuallyexercise.`(我通常锻炼。)*例：`HehardlyeverwatchesTV.`(他几乎不看电视。)*用表示次数的词回答：*`Onceaweek.`(一周一次。)*`Twiceamonth.`(一个月两次。)*`Threetimesaday.`(一天三次。)*`Sometimes.`/`Everyday.`/`Onweekends.`(有时。/每天。/在周末。)语法点解析：*`howoften`专门用来对动作发生的频率进行提问。*当主语是第三人称单数（he,she,it,单个人名或事物）时，问句中助动词用`does`，答句中动词要用第三人称单数形式（即动词后加`-s`或`-es`）。*频度副词在句中的位置：通常放在实义动词之前，be动词、情态动词或助动词之后。*例：`Sheisalwayslateforschool.`(be动词后)*例：`Theycanneverunderstandme.`(情态动词后)*例：`Doyouoftengothere?`(助动词后，实义动词前)*例：`Iusuallygetupearly.`(实义动词前)2.一般现在时的巩固与运用本单元的大部分句子都使用一般现在时，特别是在谈论习惯性、经常性的动作时。*结构：*主语（非三单）+动词原形+其他。*主语（三单）+动词三单形式+其他。*动词第三人称单数变化规则（复习）：*一般情况下加`-s`：`work-works`,`play-plays`*以`s,x,ch,sh,o`结尾的动词加`-es`：`watch-watches`,`wash-washes`,`go-goes`,`do-does`*以辅音字母加`y`结尾的动词，变`y`为`i`加`-es`：`study-studies`,`carry-carries`3."次数"的表达*`once`(一次)，`twice`(两次)，三次及以上用"基数词+times"：`threetimes`,`fivetimes`。*与表示时间的名词搭配：`onceaweek`(一周一次)，`twiceamonth`(一个月两次)，`fivetimesayear`(一年五次)。三、单元重点句型拓展1.`Whatdoyouusuallydoonweekends?`(你周末通常做什么？)*这是用来询问对方在特定时间（如周末、假期）通常做什么活动的句型。*答句：`Iusually/often/sometimes+动词短语+(onweekends).`*例：`Iusuallygoshoppingonweekends.`2.`That'sagoodhabit.`(那是个好习惯。)/`That'snotgoodforyou.`(那对你不好。)*用于对别人的行为习惯进行评价。*`begoodfor...`(对……有好处)/`bebadfor...`(对……有坏处)*例：`Eatingvegetablesisgoodforyourhealth.`(吃蔬菜对你的健康有好处。)*例：`WatchingtoomuchTVisbadforyoureyes.`(看太多电视对你的眼睛不好。)3.`Howmanyhoursdoyousleepeverynight?`(你每晚睡多少小时？)*`howmany`对可数名词的数量进行提问。*例：`Howmanytimesdoyougotothelibraryaweek?`(你一周去几次图书馆？)四、练习题为了帮助大家更好地掌握本单元所学，下面为大家设计了一些练习题。请认真完成，并对照参考答案进行检查。（一）单项选择(Choosethebestanswer)1.--______doyougotothemovies?--Onceamonth.A.HowlongB.HowoftenC.HowsoonD.Howmuch2.Mymother______getsupearly,becauseshehastomakebreakfastforus.A.neverB.sometimesC.alwaysD.hardlyever3.--WhatdoesTomusuallydoonweekends?A.playB.playsC.playingD.toplay4.Eatingtoomuchjunkfoodisnotgood______yourhealth.A.atB.forC.withD.to5.--HowoftendoesMaryexercise?--Sheexercises______aweek.A.twoB.secondC.twiceD.twotime（二）用所给词的适当形式填空(Fillintheblankswiththeproperformofthegivenwords)1.Myfatherusually______(read)newspapersafterdinner.2.They______(notoftengo)shoppingonweekdays.3.Howoften______(do)yourbrother______(clean)hisroom?4.Shesometimes______(watch)TVintheevening.5.--What'syourfavoritesport?--Ilike______(swim).I______(swim)twiceaweek.（三）句型转换(Sentencetransformation)1.Iusuallywalktoschool.(对划线部分提问)__________________usuallywalktoschool?2.HewatchesTVonceaday.(对划线部分提问)__________________he______TVaday?3.Theyoftenplaybasketballonweekends.(改为一般疑问句)______theyoften______basketballonweekends?4.Tomdoeshishomeworkeveryevening.(改为否定句)Tom____________hishomeworkeveryevening.5.Myfavoriteactivityisreadingbooks.(用`like...best`改写)I____________books______.阅读下面短文，选择正确答案。1.WhendoesLisaalwaysgetup?A.At6:00a.m.B.At6:30a.m.C.At7:00a.m.2.HowdoesLisagotoschool?A.Bybus.B.Onfoot.C.Bybike.3.WhatdoesLisasometimesdoafterschool?A.Sheplaysping-pong.B.Shedoesherhomework.C.ShewatchesTV.4.DoesLisawatchTVonschoolnights?A.Yes,shedoes.B.No,shedoesn't.C.Sometimes.5.WhattimedoesLisagotobed?A.At9:00p.m.B.At9:30p.m.C.At10:00p.m.（五）书面表达(Writing)请以"MyWeekend"为题，写一篇短文，介绍一下你通常如何度过周末。内容包括：你周末通常做什么活动，多久做一次这些活动，以及你对自己周末生活的感受。不少于50词。提示词：usually,often,sometimes,dohomework,playsports,watchTV,visitgrandparents,happy,busy...五、练习题参考答案（一）单项选择1.B2.C3.B4.B5.C（二）用所给词的适当形式填空1.reads2.don'toftengo3.does,clean4.watches5.swimming,swim（三）句型转换1.Howdoyou2.Howmanytimesdoes,watch3.Do,play4.doesn'tdo5.likereading,best（四）阅读理解1.B2.C3.A4.B5.B（五）书面表达(范文参考)MyWeekendMyweekendsareusuallybusybuthappy.OnSaturdaymorning,Ialwaysdomyhomeworkfirst.Intheafternoon,Ioftenplaybasketballwithmyfriends.It'sgoodexercise.OnSunday,Iusuallyvisitmygrandparentswit