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1、Unit 7 Grammar佟彦轩祈使句：l用来表示请求、命令、劝告、建议的句子 ，语气强烈。见语法书P178-181l句子以动词原形打头，以句点或叹号结尾 。l否定形式：l Dont + 动词原形l No +动词原形l Never + 动词原形Model(例子):lCome on.lLets enter together.lLets fill out the entry forms.lAlways check the tires before you ride.lNever ride with a flat tire.lDont forget!lUse your brakes.lStay o
2、n the track.lDont ride too close to other bikes.lBe careful.lDont skid.lWatch out for puddles.lGo, Matt, go!lLook!lDont move.bike, bicyclelpump打气筒lseat车座lbrakes车闸ltirelpedal脚蹬lhandlebars车把lhelmet副词adv.l用来修饰动词、形容词等，表示时间、地 点等。语法书P59l时间副词l地点副词l程度副词very, too, littlel疑问副词l方式副词形容词adj.变副词adv.规则l一般直接加ly，“元e
3、”去e加ly，“辅y”改i加 ly，le结尾e改y。lquick quicklylslow slowlylbad - badly l特殊变化：lgood welllhard hardlfast fast形容词与副词区别l形容词用来修饰名词，放在名词前。lShe is a good swimmer.l副词用来修饰动词，放在动词后。lShe swims well.Write the adverbs写出相应副词lShe is a hard worker. She works hard.lHe is a fast rider. He rides fast.lShe is a good swimmer.
4、 She swims well.形容词adj.名词n.动词v.副词 adv.Write the adverbslYou are quick learners. You learn quickly.lThis is a slow train. It moves slowly.情态动词：l表示人说话的语气或情态。语法书P122lcan, may, must, need, should, have tol情态动词与任何词搭配都没有任何变化， 即：情态动词+v.原must 与 have tolmust表示一种主观的需要，意思为“必须 ，得，要”； lhave to表示一种客观的需要，意思是“不 得不 ”
