Unit3Section2Grammar课件沪教版七年级英语下册

牛津广州版七年级下册Keyquestion主题范畴：人与自然GrammarUnit3TreesandusWhydoweneedtrees?Whydoweplanttrees?Tip:Payattentiontothewords

inbold.Weusethepresentcontinuoustoshowthatsomethingishappeningnow.我们用现在进行时表明现在正在发生的事情。1.现在进行时的定义(Thepresentcontinuoustense)①表示现在(说话瞬间)正在进行或发生的动作。

如：

Thestudents

arelistening

totheteacher.

He

iswatching

TVnow.

②表示当前一段时间内的活动或现阶段正在发生的事情。

如:

We

areworking

onafarmthesedays.I

amwriting

abookthismonth.am/is/are+v-ing现在分词的构成方式主要动词现在分词例子大多数动词+ingfeel→feeling以-e结尾的动词去e+ingwrite→writing以-ie结尾的动词去ie+yingdie→dying一些以一个元音字母+一个辅音字母结尾的动词双写这个辅音字母+ingrun→runningwait________drive________sit________lie________waitingdrivingsittinglyingfight________save________run________tie________fightingsavingrunningtying一般情况直接加以e结尾去e加辅元辅双写加ie结尾改y加ExerciseISheHeTheboyTheyThegirlsbebebebebebeamisisisarearesingwashdoesreadsdoeswatchTV.homework.books.exercise.thedishes.intheroom.inginginginginging请找找规律：现在进行时标志词：nowlooklisten2.现在进行时的谓语结构：be+现在分词(V-ing)3.与现在进行时连用的时间状语：

atpresent

目前;现在

atthemoment 此刻,现在atthistime

这时候

rightnow

此刻,现在;立刻,马上

now

现在thesedays

这些天提示语:

look,listen注意我们通常不将一些动词用于现在进行时。相反，我们会把它们用于一般现在时。Iknowtheanswernow.Iamknowingtheanswernow.Sheislikingthispoem.Shelikesthispoem.

✔✘✘✔ISheHeTheboyTheyThegirlsamwatchingTV.isisisarearedoinghomework.readingbooks.doingexercise.

washingthedishes.cleaningtheroom.??????请找找规律：怎样变否定句和一般疑问句？notnotnotnotnotnotAreyou4.现在进行时的句式：1.肯定句:主语+am/is/are+V-ing+其它.

如:Iamreadingabookinthelibrary.2.否定句：直接在am/is/are后加not

如：Iamwriting.

Iamnotwriting.3.一般疑问句及回答:问句:直接把am/is/are提句首,

若原句有第一人称，把第一人称变成第二人称。肯定回答:Yes,主语+

be(be是要变化的，即am/is/are).否定回答:No,主语+

be+not.Iamdrawingapig.(变一般疑问句，再作肯定回答和否定回答）---Areyoudrawingapig?---Yes,Iam./No,I’mnot.特殊疑问句：特殊疑问词+am/is/are+主语+V-ing...?Whatareyoudrawing?小结：P136肯/否定句一般疑问句一般疑问句回答特殊疑问句

句型转换1.Thegirlisdancingintheroom.（改为否定句）Thegirl____________intheroom.2.Iamreadingabook.（改为一般疑问句）__________________abook?3.Aretheyplayingfootball?（做肯定回答）______,____________.4.Isshesingingasong?（做否定回答）______,____________.5.Mymotheriscookinginthekitchen.（就划线部分提问）____________yourmother______inthekitchen?isn'tdancingAreyoureadingYestheyareNosheisn'tWhatisdoingExercise根据题目要求，完成下列句子。1.Theyaredoingthehouseworknow.(分别改成一般疑问句和否定句)

Aretheydoingthehouseworknow? Theyaren’tdoingthehouseworknow.2.Tomisreadingbooksinhisroom.(改为特殊疑问句)WhereisTomreadingbooks?3.Thestudentsarecleaningtheclassroom.(改为一般疑问句并作肯定和否定回答)Arethestudentscleaningtheclassroom?Yes,theyare.No,theyaren’t.4.I’mplayingfootball

intheplayground.(改为否定句和特殊疑问句)I’mnotplayingfootballintheplayground.Whatareyoudoingintheplayground?areeatingamfeeling/feelismovingiswaitingP42iseatingisisenjoyinggiving现在进行时

VS

一般现在时现在进行时：强调此刻或现阶段正在进行的动作，一般现在时：强调动作的经常和反复，或属于主语本身具有的特征，实际上这类动作没有时间性。例如:Jenniferisreadingabooknow.Jenniferreadsbookseverynight.aredoingP136amreadingloveborrowthinkamreadingaskCompletethesentenceswiththecorrectformofthewordsinbrackets.Pleasebequiet.Thekids____________(sleep)now.Look,theboy___________(run)fast.3.—________thestudents_________(read)anarticleinEnglish?—Yes,theyare.4.Tom____________(notstudy)English.HeisstudyingChinese.5.Themonkey____________(noteat)bananasnow.6.—Where____________they___________(stand)?—Theyarestandingoverthere.7.—WhatisMeimeidoingnow?—She______________(watch)TVwithherparents.aresleepingisrunningreadingisn’tstudyingisn’teatingarestandingiswatchingAreKatie:Hi,Alex.We(1)

arehaving(have)funatthebeach.Alex:What(2)_____everyone________(do)?Katie:Ted(3)_________(play)volleyballwithCarol.JennyandHenry(4)____________(play)badminton.Grace(5)__________(fish).Ivan(6)_____________(swim)inthesea.LauraandJohnny(7)________(lie)onthebeach.Laura(8)________(eat)anicecreamtoo.Jim(9)_________(play)theguitar.AndI(10)__________(talk)toyouonthephone,Alex.

isdoing

isplayingareplayingisfishingisswimmingarelyingiseatingisplayingamtalkingBLookatthepicturesbelowandcompletetheconversationswiththeverbsinbrackets.Mum:Thephone_________ (ring),Sam.Sam:I________(know),butI’m verybusy.Couldyou answerit,please?isringingknowMary:I__________(think)aboutwhattoweartoJane’sbirthdaypartytonight.Canyouhelpme?Ann:Sure.I________(prefer)thelongdressbetter.amthinkingpreferFred:That________(smell)verynice.What____you_______(eat),Tom?Tom:I_________(eat)somecake._____you_______(want)some?

smellsameatingareeatingDowant瞬间动词的用法一般说来，瞬间动词不能用现在进行时表达，但是像come，go，leave,arrive，start，fly

等瞬间动词用现在进行时表达时常与表示将来时的时间状语连用，表示将要发生的动作。例如:TheyareleavingforAustraliatomorrowafternoon.Iamcoming,Mum!知

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顾现在进行时SummaryInthisclass,wehavelearnedhowtowhatthepresentcontinuoustenseis.thestructureofthepresentcontinuoustense.theusageofthepresentcontinuoustense.Self-assessmentH