首页 初一年级英语语法知识点总结复习[超详细]0547

初一年级英语语法知识点总结复习[超详细]0547

举报
开通vip

初一年级英语语法知识点总结复习[超详细]0547.PAGE/NUMPAGES课时一教学任务重点语法动词be〔am,is,are的用法:be动词包括"am","is","are"三种形式。①第一人称单数配合am来用。句型解析析:Iam+…②第二人称配合are使用。句型解析:Youare+…③第三人称单数配合is使用。句型解析:Sheis+……④人称复数配合are使用。句型解析:Weare+……例句WeareinClass5,Grade7.Theyaremyfriends.Youaregoodstudents.用法口诀:我用am,你用are,is跟着他,...

初一年级英语语法知识点总结复习[超详细]0547
.PAGE/NUMPAGES课时一教学任务重点语法动词be〔am,is,are的用法:be动词包括"am","is","are"三种形式。①第一人称单数配合am来用。句型解析析:Iam+…②第二人称配合are使用。句型解析:Youare+…③第三人称单数配合is使用。句型解析:Sheis+……④人称复数配合are使用。句型解析:Weare+……例句WeareinClass5,Grade7.Theyaremyfriends.Youaregoodstudents.用法口诀:我用am,你用are,is跟着他,她,它。单数名词用is,复数名词全用are。变否定,更容易,be后not加上去。变疑问,往前提,句末问号莫丢弃。还有一条须注意,句首大写莫忘记。一.用括号中适当的词填空。  1.I________fromAustralia.  2.She_______astudent.  3.JaneandTom_________myfriends.  4.Myparents_______verybusyeveryday.  5._______thereaChineseschoolinNewYork?  6._______theyexcitedwhenheheardthenews?  7.There_____someglassesonit.  8.Ifhe_____freetomorrow,hewillgowithus.一、用be动词的适当形式填空1.I______aboy.______youaboy?No,I_____not.2.Thegirl______Jack'ssister.3.Thedog_______tallandfat.4.Themanwithbigeyes_______ateacher.5.______yourbrotherintheclassroom?6.Where_____yourmother?She______athome.7.How_______yourfather?8.MikeandLiuTao______atschool.9.Whosedress______this?10.Whosesocks______they?11.That______myredskirt.12.Who______I?13.Thejeans______onthedesk.14.Here______ascarfforyou.15.Here______somesweatersforyou.16.Theblackgloves______forSuYang.17.Thispairofgloves______forYangLing.18.Thetwocupsofmilk_____forme.19.Sometea______intheglass.20.Gaoshan'sshirt_______overthere.第二课时〔1英语人称代词和物主代词一、人称代词表示"我"、"你"、"他"、"她"、"它"、"我们"、"你们"、"他们"的词,叫做人称代词。人称代词有人称、数和格的变化,见下表:人称单数复数主格宾格主格宾格第一人称Imeweus第二人称youyouyouyou第三人称hehimtheythemsheheritit人称代词主格:作主语,表示谁怎么样了、干什么了。Iamateacher.Youarestudent.Heisastudent,too.We/You/Theyarestudents.人称代词宾格作宾语,表示动作行为的对象。Giveittome.Let’sgo二、物主代词表示所有关系的代词叫做物主代词,也可叫做代词所有格。物主代词分形容词性物主代词和名词性物主代词二种,其人称和数的变化见下表。数人称类别单数复数第一人称第二人称第三人称第一人称第二人称第三人称形容词性物主代词myyourhisheritsouryourtheir名词性物主代词mineyourshishersitsoursyourstheirs汉语我的你的他的她的它的我们的你们的他〔她、它们的形容词性物主代词+名词而名词性物主代词则相当于形容词性物主代词+名词,故其后不必加名词。如:Isthisyourbook?No,,itisn’t,it’shersThispenismine.代词练习〔一一、选出括号中正确的词,在正确的词上打勾。1.Thisis〔my/Imother.2.Nicetomeet〔your/you.3.〔He/HisnameisMark.4.What’s〔she/hername?5.Excuse〔me/my/I.6.Are〔your/youMissLi?7.〔I/MyamBen.8.〔She/Herismysister.9.Fine,thank〔your/you.10.Howoldis〔he/his二、用所给代词的正确形式填空。1.Theseare______brothers.2.Thatis_______sister.3.Lilyis_______sister.4.Tom,thisis_____cousin,Mary.5.Now_____________areinAmerica.6.Those__________are_____father’sstudents.7.Doyouknow______name?8.MikeandTom__________friends.9.Thanksforhelping________.10.______motheris______teacher.三、单项选择。〔1.Myfamily____abigfamily.Myfamily____allhere.A.is,isB.are,areC.is,areD.are,is〔2.Thisis__________.A.apictureoffamilyB.apictureofmyfamilyC.afamily’spictureD.afamilyofmypicture〔3.Let’s__________goodfriends.A.beB.areC.isD.am〔4.Issheyouraunt?Yes,__________.A.she’sB.herisC.sheisD.heis〔5.Are__________coatsyours?Yes,theyare.A.theyB.theseC.thisD.there〔6.Isthat__________uncle?No,itisn’tA.heB.sheC.herD.hers〔7.Mrs.Greenis__________grandmother.A.JimandKateB.JimandKate’sC.Jim’sandKate’sD.JimandKates’〔8.Doyouknowthename_____Mr.Green’sson?A.inB.ofC.onD.or〔9.__________thegreatphotoofyourfamily.A.thankforB.ThanksforC.ThankforD.thanksfor〔10.Arethoseyourfriends?__________.A.Yes,they’reB.No,theyareC.Yes,theyareD.Yes,thoseare代词练习〔二一、用适当的代词填空1.Welike________verymuch.2.Isthisguitar________?3.________nameisLiLi.4.Fatherboughtadeskfor________.5.________isverycoldtoday.6.Isthisyourbook,Mike? Yes,________are.7.AreyouandTomclassmates? Yes,________are.8.Eachofthestudents________apenpal.9.Hehasadog.Iwanttohave________,too.10.Herparentsare________teachers.11.Thetextiseasyforyou.Thereare________newwordsinit.12.Iwant________bananas.Givemethesebig________.二、选择正确的 答案 八年级地理上册填图题岩土工程勘察试题省略号的作用及举例应急救援安全知识车间5s试题及答案 1.Isthis________book? A.you    B.IC.she    D.your2.It'sabird.________nameisPolly. A.Its    B.It'sC.His    D.It3.What'sthat?________ajeep. A.it's    B.ItsC.It's    D.its4.What'sthatinEnglish?________. A.It'segg  B.That'seggC.It'saegg D.It'sanegg5.Whosecatisthis?Isityours?Isitawhite_______? A.cat's   B.oneC.ones    D.cats6.Pleasegivethebookto________.A.I     B.meC.my    D.mine7._________skirtisyours? A.Whose   B.WhereC.How    D.Which8.________isthispen?It'sWangFang's. A.Who's   B.WhoseC.Where   D.Which9.KateandMikedo________homeworkintheevening. A.one's   B.hisC.her    D.their10.Thereisn't________waterinthebottle. A.any    B.someC.no     D.a课时二〔2简单句一陈述句陈述句的否定结构:陈述句的否定式主要用两种结构来表达:〔1句子的谓语动词为be,have或者谓语动词有助动词、情态动词时,其否定结构为:主语+谓语动词/助动词/情态动词+not+其他成分Iamnotateacher.我不是老师。Wehavenotanybooksonanimals.我们没有任何有关动物方面的书。Thechildrenarenotplayingintheplayground.孩子们没在操场上玩。Hewillnotcome.他不会来。Wemustnotforgetthepast.我们不能忘记过去。Itcouldnotbelost.它不可能丢的。〔2当句子的谓语动词是do<即行为动词>,而且没有助动词或情态动词时,其否定结构为:主语+do+not+动词原形+其他成分Youdonotcomehereeveryday.你没有每天都来这里。Hedoesnotteachthisclass.他不教这个班。TheydidnotwatchTVlastnight.昨晚他们没看电视。注意:陈述句的语调一般用降调。但在表示疑问的语气时,用升调,在书面上要用问号来表示。YoureallywanttogotoHongKong?你真的想去香港吗?这句话表示的是一种疑问,只不过是通过陈述的语序和疑问的语气来表达的二疑问句疑问句是用来提出疑问的句子,句末用问号"?"。常考的疑问句有四类,即:一般疑问句、特殊疑问句、选择疑问句、反意疑问句。第一节一般疑问句一般疑问句通常需要用yes或no来回答,所以又叫做"是非疑问句"。在读这种句子时要用升调。一般疑问句主要有以下几种类型:1、"be+主语+表语"结构—Areyousleepy?你困了吗?—Yes,Iam.是的,我困了。3、"情态动词+主语言+行为动词〔或be"结构—May/CanIusethetelephone?我能用这部电话吗?—Yes,youcan.是的,可以。5、"助动词〔do,does,did+主语+行为动词"结构—Doyoulikeswimminginsummer?你喜欢夏天游泳吗?—No,Idon`t.不,我不喜欢。难点提示回答否定性一般疑问句时,要在Yes后面用肯定结构,表示肯定;在No后面用否定结构,表示否定。注意在说法上正好与汉语习惯相反。诀窍是在回答的时候,只要把它当成没有加否定形式的普通一般疑问句看待就可以了。注意下面例句的回答和它的意思。Ishenotyourelderbrother?他不是你的哥哥吗?—Yes,heis.不,他是〔我的哥哥。No,heisnot.是的,他不是〔我的哥哥。—Isn`tsheveryclever?她难道不是很聪明吗?—Yes,sheis.不,她很聪明。—No,sheisnot.是,她不聪明。第二节特殊疑问句一、特殊疑问句是用来提出来特定问题的疑问句,要求听到问题的人针对特定情况来做具体的回答,不能像一般疑问句一样简单地用Yes或No来回答,特殊疑问句要用降调来读。二、特殊疑问句的结构:特殊疑问词+一般疑问句WhodoEnglishhomeworkintheevening?谁晚上做英语家庭作业?Whatdoyoudointheevening?你晚上做什么?Whathomeworkdoyoudointheevening?你晚上做什么家庭作业?WhendoyoudoEnglishhomework?你什么时候做英语家庭作业?三、注意:对人提问时who"谁"对所属〔谁的提问用whose"谁的"对哪一个提问用which"哪一个"对时间提问用when"什么时候"或whattime"几点"对物体提问用what"什么"对地点提问用where"哪里"对原因提问用why"为什么"对方式提问用how"怎么样"对数量提问用howmany"多少"〔用于可数名词复数或howmuch"多少"〔用于不可数名词四、难点提示1、以why开头的特殊疑问句否定形式常用于表示建议、请求等。Whydon`tyouhaveatry?你为什么不试试呢?2、特殊疑问句常用到一些缩略形式,在平时学习中要注意习惯这些用法。Idon`twanttogothere.Howaboutyou?我不想去那儿,你呢?Butwhatelse?可是还有什么呢?把下列句子变成否定句:1.Iamlisteningtomusic._______________________________________2.Mikeisastudent._______________________________________3Sarahcancleantheclassroom.________________________________________4.Theyareinthezoo.________________________________________5.Therearesomeflowersinthevase.________________________________________6.Thisismysister._________________________________________7.Wearesweepingthefloor.__________________________________________8.Weneedsomemasks._________________________________9.Theylikemakingthepuppet._________________________________10.SuHaiandSuYangliveinanewhouse._________________________________________________11.Iputabookonmyhead._________________________________________________12.Theysing"Intheclassroom"together._______________________________________________13.WeplaybasketballonSundays._________________________________________________14.Tomlikeslisteningtomusic____________________________________________肯定句改一般疑问句的方法肯定句改一般疑问句的方法肯定句改一般疑问句的方法肯定句改一般疑问句的方法————————三步法1.有be动词/情态动词:be动词/情态动词提到句首,其余照抄,;suit<套>;apairofglasses;twopairsoftrousers十三、另外还有一些名词,其复数形式有时可表示特别意思,例:goods货物,waters水域,fishes〔各种鱼十四、除人民币元、角、分外,美元、英镑、法郎等都有复数形式。例:adollar,twodollars;ameter,twometers以O结尾的词,许多加es构成复数,特别是一些常用词如:heroes,potatoes,tomatoes,echoes,tornadoes,torpedoes,dominoes,vetoes,mosquitoes,Negroes,mangoes,buffaloes,volcanoes但下面几类词只加s:1.以"元音+o"或"oo"结尾的词如:videos,radios,studios,,zoos,bamboos,kangaroos,一些外来词,特别是音乐方面的词,如:pianos,一些缩写词和专有名词,如:kilos,photos,写出下列名词复数leaf______puppy_______box_______knife_______fly______fox______bus______bench_____brush_____kiss______church______dish_____ruler______peach________glass_____pencil________boy______zoo______man______roof_______sheep_______knife______lady______key______story______watch______bamboo______city______family______day_____apple_______eraser______speech______thief______mouse______fish_____goose____people______ox_____Chinese_______deer_______foot______child_______tooth_______guy________hero_______spy______boss_____monkey______city______goat______radio________horse______dog______用所给的单词的复数的正确形式填空:1>Therearesomany________intheforest.2>Therearethree______intheclassroom.3>These_______arered.4>______aregreat.5>Mybrotherlooksaftertwo______6>Therearesome______eatingthegrass.7>Myfatherlikestoeat_______.8>Chinese______liketoeatnoodles.9>Ihavealotof______inmybedroom.10>Ihelpmymotherwash______inthekitchen.11>Ihavetwo______.12>Therearesome______inthestreet.13>Peterhaseight_____.14>Lindahasthree_______.15>Therearesome______inthegarden.16>Michaellikesthe______.17>Therearesome______intheriver.18>Myuncleandfatherare_____.19>TomandKingare_____.20>Lindahasthree______.选出正确形式1.Icanseethree________inthezoo.Amonkeys BmonkeysCmonkey2.Thepighasfour______. A.foot B.feet C.foots3.Mytwobrothersareboth______.A.policeman B.policemans C.policemen4.Therearefour___________intheclass. A.Japanese B.Japaneses C.Japan5.Icanseeten_____inthepicture. A.sheep B.dog C.pig6.The_____hasthree______. A.boys,watches B.boy,watch C.boy,watches7.Canyousee_______ontheplate?A.bread B.breads C.breades8.Thegirloftenbrushesher_____beforeshegoestobed. A.tooth B.tooths C.teeth9.MrBlackoftendrinksome_________.A.milk B.milks C.milkes10.Therearesome_____onthefloor. A.child B.water C.books11._______willlearnEnglish.A.Woman B.Women C.Man12.Lucywillshowussomenew____ofhers. A.photo B.photos C.photoes13.Idranktwo______.A.bottlesoforange B.bottleoforange C.bottlesoforanges14.Thecateatstwo______lastnight. A.mouses B.mice C.mouse15.Ineedapenandsome_____. A.books B.deskC.chair16Jimwaslatefortwoclassesthismorning.Hesaidthatheforgotbothofthe______.A.roomsnumberB.Roomnumber C.Room’snumberD.Roomnumbers17.Thenewly-builtlibraryisa______building.A.five-storeyB.fivestoreys  C.five-storey’sD.fivestoreys’18.---Whoseumbrellaisit?  ---It’s_______.A.    somebodyelse’sB.SomebodyelseC.Somebody’selse’sD.Somebody’selse19.Ifeelterriblyhot,What’sthe_____?A.temperatureofroomB.Room’stemperatureC.RoomtemperatureD.Temperatureofroom’s20._______willmakeatriparoundtheworldduringthecomingChristmas.A.TheEvensB.TheEvens’C.TheEvensesD.TheEvenses’21.ThegirltalkingtoMaryisafriendof________.A.Mary’ssisterB.Marysister’s C.Mary’ssister’sD.sisterofMary’s22.Thewomanoverthereis______mother.A.    JuliaandShelley’sB.Julia’sandShelley’s C.JuliaandShelleyD.Julia’sandShelley23.Heisverytired.Heneeds______.A.anightrestB.arestnightC.anight’srestD.arestofnight24.---Excuseme,whereare_______offices?  ---Overthere.A.teacher’sB.teachers’C.theteacher’sD.theteachers’25.TodayisSeptember10th.It’s_____Day.Let’sgoandbuysomeflowersforourteachers.  A.TeacherB.Teachers’  C.theTeachers’D.Teacher’s课时四现在进行时现在进行时用法:一般结构:肯定句式:主语+be+现在分词+其它.否定句式:主语+be+not+现在分词+其它.一般疑问句:Be+主语+现在分词+其它?特殊疑问句:疑问词+be+主语+现在分词+其它?对一般疑问句作答,肯定回答:yes,主语+be,否定回答:no,主语+benot对现在进行时的特殊疑问句的回答,它不可以用Yes或No直接作答,要根据实际情况回答。Eg:Theyareworkingthesedays.Heisbuyingabike.Theyaren’tworkingthesedays.Heisn’tbuyingabike.Aretheyworkingthesedays?Ishebuyingabike?Whataretheydoingthesedays?Whatishedoing?现在分词的变法有1、一般在动词词尾加上-ingJump——jumpinggo——goingpushing——pushingplay——playing2、以不发音字母e结尾的动词,先去e,再加-ing.Take——takeingleave——leavingwrite——writinghave——having3、.以重读闭音节结尾,末尾只有一个辅音字母的词,它前面是单个元音字母时要先将词尾的辅音字母双写,再加上-ing.Cut—cuttingput—puttingstop—stoppingfit—fittingbegin—beginningforget—forgetting4.以ie结尾的词,将ie变为y再加ingLie—lying练习:  尽管现在进行时比较简单,但在做题过程中也常会犯一些错误,常见的错误有如下几种:  自我检测1、Look!He_____theirmotherdothehousework.A.ishelpingB.arehelpC.ishelpD.ishelpping2、_____aretheboysdoing?Theyaresingingintheroom.A.WhoB.HowC.WhatD.Where3、Don’ttalkhere.Mymother_____.A.issleepingB.aresleepingC.sleepingD.sleep4、Danny______.Don’tcallhim.A.iswriteingB.iswritingC.writingD.writes5、–When_____he_____back?–Sorry,Idon’tknow.A.does,comeB.arecomingC.iscomeD.iscoming6、It’steno’clock.Mymother_____inbed.7、What____he_____?8、We_____gamesnow.9、What____you____thessedays?10、____he___theclassroom?11、Who____inthenextroom?12、Thegirl____wearingasweater.Look!She____aredsweatertoday.二、常见方位介词短语〔一、由介词in构成的方位介词短语1、inthefront在前面2、inthefrontrow在前排3、inthebackrow在后排4、inthethirdrow在第三排5、infrontof...在...前面〔范围之外6、inthefrontof...在...前部〔范围之内7、inthemiddle在中间8、inthestreet在街上9、inthemiddleof...在中间10、inthetree在树上〔指飞鸟等外来物〔二、由介词at构成的方位介词短语1、atthefrontof...在...所在范围的前一部分2、atthebackof...在...所在范围的后一部分3、atthefootof...在...脚下4、atthetopof...在...顶部5、attheendof...在...尽头6、attheheadof...在...前头7、atthe〔schoolgate在〔校门口8、atthestation在车站9、atNo.2Chang’anRoad在长安路2号10、atmyuncle’s在我叔叔家11、athome在家12、atthedoctor’s在医务室/在诊所〔三、由介词on构成的方位介词短语1、ontheright/left在右〔左边2、onone’sright/left在某人的右〔左边3、onthedesk/table在课桌/桌上4、ontheright-hand/left-handside在右/左手边5、ontheblackboard在黑板上6、on/inthewall在墙上/里7、onthepaper在纸上8、onthetree在树上〔指树上长的,结的东西三、其它介词构成的方位介词短语1、nextto靠近/贴近2、besidethedesk在课桌旁3、behindthedoor在门后4、underthebed在床下5、nearthewindow靠近窗户6、outsidethegate在门外课时五祈使句一、单项选择:1.Please____,they’rehavingameeting.A.notbesonoisyB.bequiteC.mustn’ttalkD.nospeaking2.____tomeetmeatthestation.I’llbewaitingthere.A.NottoforgetB.NotforgetC.ForgetnotD.Don’tforget3.It’safineday.Let’sgofishing,____?A.won’tweB.willyouC.don’tweD.shallwe4.Don’tsmokeinthemeeting-room,____?A.doyouB.willyouC.canyouD.couldyou5.–Don’tforgettocometomybirthdaypartytomorrow.-I____.A.don’tB.won’tC.can’tD.haven’t6.Ifyouaretired,______arest.A.haveB.havingC.tohaveD.had7.______mego.Itisveryimportantforme.A.DoletB.LetdoC.DoingletD.Todolet8.Heisnothonest.______believehim.A.NotB.Don’tC.TonotD.Notto9._____upearlytomorrow,oryoucan’tcatchthetrain.A.GettingB.GetC.TogetD.Got10._____inthestreet.It’sdangerous.A.NotplayB.NottoplayC.Don’tplayD.Don’ttoplay11.Please______mesomemoney,willyou?A.lendB.lendingC.borrowD.borrowing12.Thefilmisabouttobegin.Please______seated.A.beB.areC.isD.being13.____downtheradio.Thebaby’sasleepinthenextroom.A.TurningB.ToturnC.TurnedD.Turn14.Lucy,____thedoororsomeonewillcomein.A.closeB.closesC.notcloseD.isclosing15.____andplayfootballinthestreetafterlunch.A.Let’snottogoB.Let’snotgoC.Let’sdon’tgoD.Notlet’sgo16.Asignwiththewords"____"isoftenfoundinabus.A.NotparkingB.NotsmokingC.NoparkingD.Nosmoking17.____ChineseinyouEnglishclass.A.NotspeakB.Don’tspeakC.SpeaknotD.Don’tspeaking18._____theboxes.Youmayusethemlater.A.KeepB.KeepingC.TokeepD.Kept19.Ifyouwanttostay,letmeknow,______?A.willyouB.shallweC.doyouD.dowe20.Nevercomelateagain,______?A.willyouB.won’tyouC.doyouD.doeshe21.TheTVistooloud.Please________.A.turnitdownB.toturnitdownC.turndownitD.toturndownit22._______lateagain,Bill!A.Don'ttobeB.Don'tbeC.NotbeD.Benot23._______crosstheroaduntilthetrafficlightsturnsgreen.A.NotB.Won'tC.Doesn'tD.Don't24.Pleasehelpmecarryit,______?A.willIB.willyouC.shallID.shallwe25.Don'tmakesomuchnoise,______?A.willyouB.won'tyouC.shallweD.doyou26.Doyouknowthegirl______underthetree?A.standB.tostandC.standingD.stood27.Kate,_______yourhomeworkheretomorrow.A.bringB.bringsC.tobringD.bringing28.________methetruth,orI'llbeangry.A.TellingB.TotellC.ToldD.Tell29.I'vekeptthedog_______Maomaoforalongtime.A.nameB.namedC.namingD.toname30.Don'tyouknowthat_______isgoodforourhealth?A.swimB.swimmingC.swamD.swims 二.用括号内所给动词的适当形式填空。1.It’sanimportantmeeting.__________late.2.____________anynoise!Yourmotherissleeping.3.____________withyourmouthfulloffoodand____________polite.4.____________and____________aloud.5.____________yourhomeworkfortomorrow,Larry.6.____________out!Acariscoming.7.____________ustenyearsandjustseewhatourcountrywillbelike.8.____________thebabycry.9.Wearmoreclothesoryou____________acold.10.Let’s____________anythingaboutit.三、句型转换11.Willyoupleasereaditagainmoreslowly?〔改为祈使句__________againmoreslowly,please.12.Ifyoudon'tlistentome,I'llgo.〔改为同义句__________me,orI’llgo.13.Let'swatchthesportsgames.〔改为反意疑问句Let'swatchthesportsgames,__________?14.Theteachersoftentellthestudentsnottobecareless.〔
本文档为【初一年级英语语法知识点总结复习[超详细]0547】,请使用软件OFFICE或WPS软件打开。作品中的文字与图均可以修改和编辑, 图片更改请在作品中右键图片并更换,文字修改请直接点击文字进行修改,也可以新增和删除文档中的内容。
该文档来自用户分享,如有侵权行为请发邮件ishare@vip.sina.com联系网站客服,我们会及时删除。
[版权声明] 本站所有资料为用户分享产生,若发现您的权利被侵害,请联系客服邮件isharekefu@iask.cn,我们尽快处理。
本作品所展示的图片、画像、字体、音乐的版权可能需版权方额外授权,请谨慎使用。
网站提供的党政主题相关内容(国旗、国徽、党徽..)目的在于配合国家政策宣传,仅限个人学习分享使用,禁止用于任何广告和商用目的。
下载需要: ¥20.0 已有0 人下载
最新资料
资料动态
专题动态
个人认证用户
zxiang
多年工作经验
格式:doc
大小:226KB
软件:Word
页数:21
分类:建设工程
上传时间:2022-02-03
浏览量:4