Unit 7 Protect the Earth 课件.ppt

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1、Unit7ProtecttheearthStorytimeReadandanswerWhythewaterisuseful?Howshouldwesaveenergy?Whatcantreeshelpustodo?Whatweuseplastictodo?HowtoprotecttheEarth?WeshouldsavewaterWeshouldsaveenergyHowtoprotecttheEarth?WeshouldnotcuttoomanytreesGrammartime1.should的用法weshould/s

2、houldn’tdo…2.use的用法use…to…情态动词shouldshould在本课中表示“应该，必须”，用于表示忠告、建议等。例如：Youshoulddrinksomehotteawithhoney.你应该喝些蜂蜜茶。Sheistired.Sheshouldgotobedearly.她累了，她应该早点睡觉。情态动词should的用法与情态动词can一样，should的否定形式为should+not或shouldn’t；在疑问句中，should放在主语前，should没有人称和数的变化。例如：Youshoulddr

3、inkwater.Youshouldnot=(shouldn’t)drinkwater.Shouldyoudrinkwater?Yes,youshould./No,youshouldn’t.Weusewatertowashclothes.use...to...Weusewatertowashfruits.Weusewoodstobuildahouse.Weuseplastictomakebottles.FuntimeFuntime总结1.情态动词should的用法与情态动词can一样，should的否定形式为should

4、+not或shouldn’t；在疑问句中，should放在主语前，should没有人称和数的变化。2.use…to…表示用……做……Byebye!