初一英语―现在进行时

现在进行时的讲解与练习。（一）基本用法：（1）表示（说话瞬间）正在进行或发生的动作。I’mvisitingmyfriendsnow.（2）也可表示当前一段时间内的活动或现阶段正在进行的动作或存在的状态。Heisalwaysworkinghard.他总是非常努力地工作。(表示赞扬)（二）谓语构成：be(am/is/are)＋v-ing（动词的现在分词）【注意】be动词要与主语的人称和数保持一致。如：I’mwatchingTVnow.我现在正在看电视。They’replayingfootball.他们正在踢足球。（三）现在分词的构成。（1）一般情况下在动词词尾加ing。go→goingask（问，询问）→askinglook→looking（2）以不发音的e结尾的动词，去掉e加ing。have→havingtake→takingmake（做，制造）→makingwrite（写）→writing（3）以一个辅音字母结尾的重读闭音节，双写最后一个字母，再加-ing。get→gettingsit（坐）→sittingput（放）→puttingrun（跑）→runningswim→swimmingbegin（开始）→beginningshop→shopping(4)特殊形式lie-lyingdie-dying（四）现在进行时态的肯定式、否定式、疑问式及简略回答。（1）肯定式：主语+be＋v-ing+其他Heisrunning.他正在跑。Thestudentsarecleaningtheroomnow.（2）否定式：主语+be＋not＋v-ing+其他Heisnotrunning.Thestudentsaren’tcleaningtheroomnow.这些学生现在没有在打扫房间。（3）一般问句：be动词提前。“Be+主语+v-ing+其他？”肯定答语Yes，主语＋be.否定答语No，主语＋benot.Isherunning?Yes,heis.No,heisn’t.AreThestudentscleaningtheroomnow?Yes,theyare.No,theyaren’t.（4）特殊问句式：“疑问词+be＋主语＋v-ing＋其他？”a.对谓语动词进行提问的：What＋be＋主语＋doing＋其他？Whatistheoldmandoingunderthetree?那个老人正在树下面做什么呢？b.对其他成份进行提问的，疑问词＋一般疑问句？Whereistheboyswimming?那个男孩正在哪里游泳？Whoisshewaitingfor?她正在等谁呢？五、现在进行时与一般现在时的区别（一）现在进行时表示动作的暂时性，而一般现在时表示动作的习惯性和经常性IamwatchingTVnow.（暂时性）我现在在看电视。IwatchTVeveryday.（经常性）我每天都看电视。（二）现在进行时可表示短暂性动作，而一般现在时表示长久性动作。LucyislivinginBeijing.（短时间居住）露西暂时住在北京。LucylivesinBeijing.（长久性居住）露西在北京居住或生活。（三）现在进行时表示的动作可带有感情色彩，而一般现在时所表述的动作通常是事实。You’realwaysforgettingthemostimportantthings.（责备）你总是爱忘记最重要的事情。Heisalwayshelpingothers.（赞扬）他一直都在帮助他人。Heoftenhelpsothers.（事实）他经常帮助别人。（四）有些动词不能用进行时，know,understand,love,like,hate,wish,want,think,hope,have,believe,agree,hear,see,notice。这些动词通常用一般现在时表示说话时发生的动作。1)表示“拥有”的动词。如have(has)等。例句：Ihaveanicebikenow.(我现在有一辆漂亮的自行车。)不能说成:Iamhavinganicebikenow.2)有些表示感觉的感官动词。如：see,find,look(看起来)，hear(听见)等。例句：Weseehim.(我们看见他。)不能说成：Weareseeinghim.但是，有些表示感觉的动词，如：listento,lookat等可用现在进行时。如：Theyarelisteningtotheteacher.(他们在听老师讲课。)3)表示“喜欢”“厌恶”的动词。如：like,love,hate(讨厌)等。例句：Weloveourcountry.(我们热爱祖国。)不可说:Wearelovingourcountry.4)表示知识或脑力的动词。如：think,know,forget等。例句：Ithinkyouareright.(我认为你是对的。)不能说成：Iamthinkingyouareright.5)表示状态的be动词“是”。例句：Sheisathome.(她在家。)不能说成：Sheisbeingathome.6)表示“希望”、“愿望”、“心愿”等的动词。如：want等词。例句：Iwanttoseehernow.(我现在就想见到她。)不能说成：Iamwantingtoseehernow.【典型例题】一、写出下列动词的现在分词形式work_______sing_______play_______study________have_______dance______write_______take_________run_________sit_________shop________swim_______lie________diebeginget二、用括号内所给单词的适当形式填空。1.Look!There_____(be)alotofpeopleoverthere.What_______they__________(do)now?2.—What__________yourmother__________(do)?—Sheisateacher.3.It__________(rain)heavilyoutsidenow.Youmuststayathome.4.Don’tsing.Thebaby__________(sleep).5.Mybrother__________(notlike)playingbasketball,buthe______(like)playingfootball.6.—What_________youusually_________(do)onSunday?—Iusually_________(stay)athomeand_________(do)myhomework.7.Listen!Thegirls_________(sing)inthenextroom.8.Mysister_________(want)tobeateacher.9.It’sseveno’clocknow.TheGreens_________(have)supper.10.Heoften_________(swim)onSundays.Look!He_________(swim)atthepool.三、单项选择1.Iwant_________homeworknow.A.doingB.todoC.todomyD.domy2.It’stime_________.A.gotoschoolB.playgamesC.togohomeD.todomyhomeworks3.Theboyis_________tohisteacher.A.sayingB.speakingC.talkingD.telling4.I’m_________abookintheroom.A.watchingB.seeingC.readingD.looking5.Where_________he_________from?A.is,comeB.do,comeC.does,comeD.is,from6.Dotheyhaveanewcar?Yes,_________.A.theyareB.theyhaveC.theydon’tD.theydo7.Heoften_________supperat6:00intheevening.A.haveB.hasC.ishavingD.iseating8.It’s6o’clockinthemorning.He_________.A.getupB.getsupC.isgetingupD.isgettingup9.Whatareyoudoing?I’m_________TV.A.watchB.watchesC.towatchD.watching10.We_________anyChineseclassesonFriday.A.arehavingB.aren’thavingC.don’thaveD.arehave11.Tom_________anEnglishclassnow.A.ishavingB.hasC.havingD.have12.Areyouplayingbasketball?No,we_________.A.isn’tB.aren’tC.notD.don’t四、按要求改写句子1.Theboyisplayingbasketball.否定句：____________________________一般疑问句：_________________________肯定回答：__________________________否定回答：__________________________对“Theboy”提问：___________________2.连词成句1)read.anewbook.________________2)cleantheblackboard.________________3)she,thewindow,open,now.(用现在进行时连词成句.)_____________________4)Thebirdsaresinginginthetree.(就划线部分提问)________________________5)is,who,thewindow,cleaning?(连词成句)______________________6)Thechildrenareplayinggamesnearthehouse.(就划线部分提问)_____________________7)Sheisclosingthedoornow.(改成否定句)______________________8)Youaredoingyourhomework.(用I作主语改写句子)______________________9)they,thetree,sing,now,under.(用现在进行时连词成句.)_____________________10)TheYoungPioneersarehelpingtheoldwoman.(改成一般疑句)_________________11)Look!Lilyisdancing.（改为一般疑问句）_____________________________________12)Kateislookingforherwatch.（改为否定句）_____________________________________13)MrsWhiteiswatchingTV.（划线部分提问）______________________________________14)Iamdoinghomework.（改为否定句）______________________________________15)Theyarewaitingforyouatthelibrary.（就划线部分提问）_____________________________________16)Theyaredoinghousework.(分别改成一般疑问