Unit4语法专项课件并列连词不带to的不定式until引导的从句课件北师大版八年级英语下册

教学课件北师大英语八年级下册Unit4语法专项——并列连词、不带to的不定式、until引导的从句

全解精讲+分层练习

学习目标1.掌握常见并列连词的用法，能根据语境正确选择并完成句式合并2.熟记不带to的不定式的常见结构，能正确完成词形填空和语态转换3.理解until引导的时间状语从句用法，掌握肯定/否定句及时态规则4.能独立完成本单元语法的各类基础题型，规避常见错误

语法一并列连词定义与功能并列连词用于连接语法地位平等的词、短语或句子连接后可让表达更简洁，逻辑更清晰被连接的两部分在句中作相同成分，无主次之分常见核心并列连词：and,but,or,so,for例句：IlikereadingandIlikewritingtoo.常见并列连词用法与例句（一）连词表达逻辑例句and并列、顺承Shelikesemojisandsheusesthemeveryday.but转折Emojisarepopular,butsomepeopledislikethem.or选择、否则Youcansendamessage,oryoucanmakeacall.常见并列连词用法与例句（二）连词表达逻辑例句so因果（因此）Ididn'tknowtheemoji'smeaning,soIaskedmyfriend.for原因（因为）Emojisareeasytounderstand,fortheyarepicture-based.注意：for表原因多用于书面语，不可置于句首并列连词易混点与使用提醒1.and表顺承时，连接的动作有先后顺序，如Igetupandbrushmyteeth.2.or表“否则”时，用于警告或建议，如Hurryup,oryouwillbelate.3.for表原因是补充说明，不可与because连用，避免重复4.连接两个句子时，连词前可加逗号，连接词/短语时不加语法一小练手·并列连词填空1.Ilovedrawing__________Ioftendrawemojisbymyself.2.Hewantedtouseanemoji,__________hecouldn'tfindtherightone.3.Youcanusewords__________emojistoexpressyourfeelings.4.Themovieisveryinteresting,__________manypeoplewanttowatchit.5.SheisgoodatEnglish,__________shepracticesiteveryday.andbutorsofor语法二不带to的不定式定义与核心规则不带to的不定式指在特定动词/结构后，直接用动词原形核心规则：省略不定式符号to，仅保留动词原形适用场景为固定的动词搭配和特殊句式，无灵活变化此用法在主动语态中使用，被动语态需恢复to例句：Isawhersmile.（主动，不带to）→Shewasseentosmile.（被动，恢复to）不带to的不定式常见结构（一）感官动词+sb.dosth.表看见/听见某人做某事的全过程，感官动词为固定类常见感官动词：see,hear,watch,notice,feel例句：Iheardhimsingasongintheroom.例句：Wewatchedthechildrenplaygamesinthepark.不带to的不定式常见结构（二）使役动词+sb.dosth.表让/使某人做某事，使役动词后直接接动词原形常见使役动词：make,let,have例句：Theteachermadeuscleantheclassroom.例句：MymomletmewatchTVafterfinishinghomework.不带to的不定式常见结构（三）固定句式/搭配，这类搭配为固定用法，需熟记，后直接接动词原形1.hadbetter(not)dosth.最好（不）做某事2.wouldratherdosth.宁愿做某事3.whynotdosth.?为什么不做某事？例句：Youhadbetternotgooutaloneatnight.例句：Whynotjoinusinthegame?不带to的不定式核心考点·被动语态主动语态中：感官/使役动词+sb.dosth.（不带to）被动语态中：sb.+be+过去分词+todosth.（必须恢复to）这是本语法最核心的考点，也是高频易错点例句：Hemademefinishthework.→Iwasmadetofinishthework.例句：Isawherentertheroom.→Shewasseentoentertheroom.语法二小练手·词形填空1.Isawmyclassmate__________(draw)anemojionthenotebook.2.Lethim__________(help)youwithyourEnglishstudy.3.Youhadbetter__________(be)carefulwiththenewwords.4.Thebossmadetheworkers__________(work)foreighthoursaday.5.Iheardthegirl__________(laugh)loudlyinthenextroom.drawhelpbeworklaugh语法三until引导的从句定义与核心含义until意为“直到……为止”，引导时间状语从句从句表时间节点，主句动作/状态持续到该节点结束可用于肯定句和否定句，两种句式表达的逻辑不同主句和从句的时态搭配有固定规则，需严格遵守例句：Iwillwaituntilyoucomeback.until引导的从句肯定句用法肯定句中：主句动词必须为延续性动词表达含义：主句动作/状态一直持续，直到从句动作发生才停止常见延续性动词：wait,stay,study,work,stand例句：Shestudieduntilhermothercamehome.（一直学习到妈妈回家）例句：Theboywaiteduntilthebusarrived.（一直等到公交车来）until引导的从句否定句用法否定句结构：not...until...主句动词为非延续性动词，表达含义：直到从句动作发生，主句动作才开始常见非延续性动词：go,come,know,understand,start例句：Ididn'tknowthetruthuntilhetoldme.（直到他说，我才知道真相）例句：Hedidn'tgotobeduntilhefinishedhishomework.until引导的从句时态搭配规则主句时态从句时态适用场景一般将来时一般现在时表将来的动作，从句用一般现在时表将来一般过去时一般过去时表过去的动作，主从句时态保持一致核心：主将从现，主过从过，无其他特殊变化until引导的从句时态例句与转换主将从现Iwillstayhereuntilyoufinishyourwork.（主句将来时，从句现在时）主过从过Theydidn'tleaveuntilthemeetingended.（主句过去时，从句过去时）同义转换Iwillwaituntilyoucome.=Iwon'tleaveuntilyoucome.语法三小练手·词形填空1.Wewillnotleaveuntiltheteacher__________(come).2.Hedidn'tgotoschooluntilhe__________(be)sevenyearsold.3.Thegirlwillcryuntilhermother__________(buy)heratoy.4.Iwaiteduntiltherain__________(stop)yesterday.5.Shewillstudyharduntilshe__________(pass)theexam.comeswasbuysstoppedpasses单元语法综合小练·单选（一）1.Ilikereading__________Ioftengotothelibraryonweekends.A.butB.andC.orD.for2.Theteacherletus__________Englishsongsinclass.A.singB.tosingC.singingD.sang3.Ididn'tgotothepark__________therainstopped.A.whenB.whileC.untilD.asBAC单元语法综合小练·单选（二）4.Hurryup,__________youwillmisstheearlybus.A.andB.orC.butD.so5.Hewasseen__________theclassroomjustnow.A.leaveB.toleaveC.leavingD.left6.Shewillkeepworking__________shefinishesthetask.A.untilB.ifC.becauseD.thoughBBA单元语法综合小练·句型转换（一）1.Heistired.Hegoestobedearly.（用so合并）→Heistired,__________hegoestobedearly.2.Isawhimplayfootballontheplayground.（改为被动语态）→Hewasseen____________________footballontheplayground.3.Iwillstayhereuntilyoucallme.（改为同义句）→Iwon't__________hereuntilyoucallme.sotoplayleave单元语法综合小练·句型转换（二）4.Youcanreadabook.Youcanwatchamovie.（用or合并）→Youcanreadabook__________watchamovie.5.Thebossmadehimworkallday.（改为被动语态）→Hewasmade____________________allday.6.Hedidn'tunderstandthelessonuntiltheteacherexplainedit.（同义句）→Heunderstoodthelesson__________theteacherexplainedit.ortoworkafter单元语法综合练习题（一）一、用适当的并列连词填空1.Thebookisinteresting__________educational,somanystudentslikeit.2.Heisverybusy,__________hehasnotimetoplaygames.3.Youcandrinktea__________coffee;it'suptoyou.4.Shefailedtheexam,__________shedidn'tstudyhard.5.Theweatheriscold,__________Iputonathickcoat.andsoorforso单元语法综合练习题（二）二、用所给词的适当形式填空6.Whynot__________(try)touseemojistomakeyourmessagelively?7.Ifelttheground__________(shake)justnow.8.Shewasmade__________(clean)theroombyhermother.9.Youhadbetter__________(nottalk)intheclass.10.Wenoticedaboy__________(run)onthestreet.tryshaketocleannottalkrun单元语法综合练习题（三）三、用所给词的适当形式填空（until从句）11.IwillnotgohomeuntilI__________(finish)mywork.12.Theywaiteduntilthesun__________(rise)yesterday.13.Thebabywillnotstopcryinguntilhismother__________(come)back.14.Hedidn'tknowtheansweruntiltheteacher__________(tell)him.15.Shewillreadbooksuntilh