牛津译林版八年级英语上册Unit4Grammarppt课件.ppt
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1、GrammarA1.祈使句的概念祈使句表示请求、命令等。它的主语是you(听话人),通常不说出。祈使句肯定结构中的谓语动词一律用动词原形。祈使句末用感叹号或句号,句子用降调。2.祈使句的结构1)祈使句的肯定结构V 型(以行为动词原形开头),例如:Sitdown!坐下!Standup!起立!Be 型(以be开头),例如:Bequiet!安静!Becareful!小心!Let 型(以let 开头),例如:Letmetry.让我试试看。Letslookatthemap.让我们看看地图。lets 是letus的简略式。表示请求、劝告的祈使句还常常在句前或句末加上please,构成句式:Please或,
2、please.以使语气更加缓和或客气。例如:Pleasestandup.或Standup,please.请站起来。Pleasehavearest.或Havearest,please.请休息一下。2)祈使句的否定结构,一律在肯定结构前加Donot(Dont)。例如:Dontgothere,please.请别去那儿。Dontbelateforclass!上课别迟到!Dontlethimin.不要让他进来。注意:Lets 型祈使句,其否定式也可用Letsnot,例如:Letsnothaverest.咱们别休息了。Letsnotsithere!我们不要坐在这儿!What should we do in
3、 the library?Keepthelibraryquiet.Keepthelibraryclean.Readthebookscarefully.KeepthebookscleanWhat shouldnt we do in the library?Dontmakemuchnoise.Dontwriteonthebooks.Donttalktoyourclassmatesloudly.Donttakethebooksoutofthelibrary.GivinginstructionsWestartasentence(句子)withthebaseformofaverbwhenwewantto
4、tellpeoplewhattodo.e.g.Putupapictureonthewall.Paintthewallsblue.Weoftenaddpleaseinasentencetomakeaninstructionmorepolite.e.g.Pleasefixtheshelfforme.Donttouchthewetpaint,please.e.g.Dontpaintthecat.Weoftenadddonot/dontinfrontofaverbwhenwewanttotellpeoplenottodosomething.Millieisteachingherclassmatesho
5、wtomakecardstohelpthemrememberthingsbetter.LookatthepicturesandhelpMilliecompletetheinstruction.Howtomakecards_ out pieces of card with a pair of scissors.Cutcutdrawgivekeeplooktrywrite_ some words or a sentence on each card.Writecutdrawgivekeeplooktrywrite_ a picture about the words or sentence on
6、the other side of the card.Drawcutdrawgivekeeplooktrywrite_ at the picture and _ to remember what is on the other side.Look trycutdrawgivekeeplooktrywritePlease _(not)up._ trying,and you will find you can remember things better.dontgive KeepcutdrawgivekeeplooktrywriteHowtobuildabrickhouse?_somebrick
7、s(砖块)._thewallswiththebricks._thewindowsandthedoors._surethehouseissafe.FindBuildFixMakefixbuildmakefindParkyourbikehere.Pleasegoslowly.Bequiet,please.Dontmakeanynoise.Dontswimhere.Dontparkyourbikehere.Dontsmokehere.Dontfishhere.1.剪出2.写一些话或一个句子3.在每张卡上4.在卡的另一面5.尝试做某事6.记住某事7.放弃8.放弃某事/做某事9.坚持尝试10.把事情记得
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