小学阶段现在进行时的结构和用法

小学阶段现在进行时的结构和用法小学阶段现在进行时的结构和用法/NUMPAGES8小学阶段现在进行时的结构和用法小学阶段现在进行时的结构和用法小学阶段现在进行时的结构和用法一、概念现在进行时表示说话时正在进行或发生的动作,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．结构：助动词be(am/is/are)+现在分词.二、现在分词的构成：1.大多数动词后可在动词后直接加-ing．Eg:carry-carrying,catch-catching,drink-drinking,enjoy-enjoyinghurry-hurrying,do-doing,read-reading,think-thinking2.如果动词以-e结尾,则去掉-e,再加-ing,如come-coming,have-having,make-making,ride-riding,write-writing,take-taking,use-using．3.如果动词只有一个元音字母,而其后跟有一个辅音字母时,将此辅音字母双写,再加-ing如：hit-hitting,let-letting,put-putting,run-running,sit-sitting．4.如果动词有两个音节,且重音在第二个音节上,则末尾的辅音字母须双写,再加-ing,如:for’get-forgetting,pre’fer-preferring,up’set-upsetting．试比较’benefit/benfiting,’differ/differing,’profit/profiting,这些词的重音在第一个音节上,因此其末尾的辅音字母不双写．5.以-ic结尾的动词,应先把-ic变为-ick,再加-ing,eg:panic/panicking,picnic/picnicking,但lie/lying,die/dying,tie/tying是特殊变化要记住．三、句型结构：1.现在进行时的肯定形式、否定形式、疑问形式及其回答,所有变化都体现在助动词be(is/am/are)上．①现在进行时的肯定形式：主语+be(am/is/are)+doing+其他成分Iamsinging.Theyarewriting.②现在进行时的否定形式:主语+be(am/is/are)+not+doing+其他成分Iamnotsinging.Theyaren’twriting.③一般疑问句及回答：be(am/is/are)+主语+doing+其他成分AmIsinging?Yes,youare./No,youaren’t.Aretheywriting?Yes,theyare./No,theyaren’t.④特殊疑问句及回答:特殊疑问词+be(am/is/are)+主语+doing+其他成分Whatareyoudoing?Weareplaying(要求就提问内容具体回答).2.缩写形式如下:IamI’mYouareYou’reHeisHe’sSheisShe’sItisIt’sWeareWe’reTheyareThey’re3.说明:不是所有动词都能用现在进行时态的,如：see、like、want、know等动词往往都不用进行时态．练习一.用现在进行时完成下列句子:1.______you__________(fly)akite?Yes,_______.2.______you___________(sit)intheboat?3.______he_____________(talk)withme?4.We_______________(play)footballnow.5.What_________you__________(do)?6.I_____________(sing)anEnglishsong.7.What________he____________(mend)?8.He______________(mend)acar.9.Theseboys_________(play)tennisontheplayground.10.Mymother______________(cook)inthekitchen.11.Wecan’thelpyou,becausewe____________(have)classes.12.________theboy___________(write)hishomework?13.Look!Thesebutterflies_________(fly)inthesky.14.Listen!Thegirl___________(sing)inthenextroom.15.Thenaughtyboy__________(swim)intheriver.

二.选择1.Look.Lucyis_____anewbiketoday.A.jumpingB.runningC.ridingDtakeing2.Thechildren_____football.A.isplayingB.areplayingC.playtheD.playa3.They______TVintheevening.Theydotheirhomework.A.arewatchingB.can’twatchingC.don’twatchD.don’twatching4.Listen!She____intheclassroom.A.issingingB.singC.tosingD.issing5.______areyoueating?I’meating______meat.A.What,someB.Which,anyC.Where,notD.What,a6.Isshe____something?A.eatB.eatingC.eattingD.eats7.Mydictionary___,Ihavelookedforiteverywherebutstill___it.A.haslost,don’tfindB.ismissing,don’tfindC.haslost,haven’tfoundD.ismissing,haven’tfound.8..Havingacomputerforpersonaluseisnoeasytaskbecausetechnology_______sorapidly.A.ischangingB.haschangedC.willhavechangedD.willchange9.Thebuilding_______,Ican’tstandthenoise.A.wasbeingbuiltB.isbuiltC.isbeingbuiltD.builds10.Ican’tcatchupwiththefashion,becausetheclothesstyle_______allthetime.A.haschangedB.ischangedC.ischangingD.changed11.It’ssixintheafternoon.TheGreens_______lunchtogether.A.hasB.arehavingC.havehadD.hadhad12.Don’tmakeanynoisewhilethestudents_______totheclass.A.arelisteningB.listenedC.havelistenedD.hadlistened13.JackandKetty_______inthelake.Let’sjointhem,shallwe?A.swimB.haveswumC.swamD.areswimming14.Look!Thechildren_______basketballontheplayground.A.playsB.playedC.isplayingD.areplaying15.Thekite_______highintheskynow.Itlookslikeabigbird.A.hasflownB.isflyingC.wasflyingD.flew16.Asweallknow,thepopulationintheworld_______fasterandfaster.A.isgrownB.isgrowingC.aregrownD.aregrowing17.Tomysurprise,he_______inclass.A.isalwaysspeakingB.wouldalwaysspeakC.hasalwaysbeenspeakingD.doesspeakalways18.Iwanttoknowwhenhe_______forNewYorktomorrow.A.hasleftB.isleavingC.hadleftD.hasbeenleaving19.He_______ofhowhecandomoreforthepeople.A.hadalwaystho