鬼牌2 毒蜂2.5:Unit 9 When was it invented? 重点、难点、考点及疑点注释
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Unit 9 When was it invented? 重点、难点、考点及疑点注释 1. They’re used for seeing in the dark. (P69)它们被用于在黑夜里观看。 be used for表示“被用来做……”,介词for表示目的和用途,后面接名词或动词-ing形式。 Wood can be used for making paper.木材可以被用来造纸。 知识拓展 含有be used的常用短语: ◎be used as表示“被用作……”,介词as意思是“作为”的意思,其后一般接名词,强调使用的工具及手段。 This book can be used as a textbook.这本书可以当作教科书来用。 ◎be used by表示“被……使用”,by后接动作的执行者。 This kind of machine is used by farmers for getting in crops. 农民们用这种机器来收割庄稼。 2. I think the most helpful invention is the light bulb.
Unit 9 When was it invented? 重点、难点、考点及疑点注释
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