Unit 2 Topic 3 课件 2023-2024学年仁爱科普版九年级英语上册

　九上　U2 T3 考点精讲 考点1    For example, we should use both sides of paper and reuse plastic bag. 比如,我们应该双面使用纸张,重复使用塑料袋。 both修饰复数名词, 而either/each修饰单数名词。 both sides of paper=either/each side of paper纸的两面 练 There are many trees and flowers on 　      sides of the road. =There are many trees and flowers on 　     side of the road. both either/each 考点2    Then we sort them so that they can be recycled. 然后我们把它们分类存放,以便回收利用。 sort    v.把……分类　sort the garbage 垃圾分类 n.种类　all kinds/sorts of 各种各样的 练 Rubbish can be 　     (sort) into plastics, glass and paper. sorted 考点3    First, you ought to shut off the electricity when you leave a room. 首先，你离开房间的时候，应该切断电源。 ought to情态动词,无人称和数的变化,后接动词原形,意为“应该,应当”, 表示责任、义务或道义上该做某事。 We ought to take a cloth bag when shopping. 我们购物时应该带个布袋。 否定形式: ought not/oughtn't to We ought not to tell her the bad news. 我们不应该告诉她这个坏消息。 疑问句: Ought+主语+to do...? —Ought we to go there?—Yes, you ought to./No, you ought not to. 练 ⑴As students, we 　     to prevent the act of cheating in the exams. A.ought　　　　　　B.should　　　　　　C.oughtn't ⑵We 　      be polite to the old. A.can　　　　　　B.ought to　　　　　　C.could A B 考点4    You'd better walk or ride a bike instead of taking a bus or a taxi if you travel a short distance. 如果你行进一小段距离,你最好步行或骑 自行车，而不是乘公共汽车或出租车。 辨析    instead, instead of 1.instead“代替;顶替;反而;却”,副词,只能单独使用,可用于句首或句 尾。通常是上句先否定一种情况,再以instead引出下句,提出另一种的情况。 You are tired. Let me do it instead. 你累了,让我替你做吧。 She never watched TV. Instead, she played table tennis all day. 她从不 看电视,而是整天打乒乓球。 2.instead of “代替,而不是”,介词短语,后可跟名词、代词或动词的-ing 形式,相当于rather than。 Today he will stay at home instead of going hiking with us.今天他将待 在家里,而不是和我们一起去远足。 He likes listening to music rather than/instead of singing. 他喜欢听音乐而不是唱歌。 练 ⑴We should take our own cloth bags when shopping 　      buying plastic bags. A.instead of　　　　　　B.above all　　　　　　C.as well A ⑵—Many people spend all day on their phones 　      reading books. —That's too bad. Everyone should be a book lover. Reading is more enj