第 21 课时 九年级 Units 13 ～ 14考点一 cut down 的用法【课文原句】 Well, to cut down air pollution, we should take the bus or subway instead of driving. 为了减少空气污染，我们应该乘坐公共汽车或者地铁，而不是开车。 ( 九 P98)(1)cut down 意为“减少”，是“动词＋副词”结构的短语，所接的宾语若为名词，宾语可位于 down 的前面或后面；若为代词，只能位于 down 的前面。You'd better cut the article down to about 2 ， 000 words. 你最好把这篇文章缩减到 2 000 字左右。(2)cut down 还可表示“砍倒”。They cut down the big tree. 他们砍倒了这棵大树。(3) 含有 cut 的短语： cut off 切断；切除cut into 把……切成…… cut up 切碎 cut in 插队；插嘴1 ． (2018· 江苏扬州江都模拟 )It is impolite for children to when their parents are talking with others.A ． cut down B ． cut outC ． cut in D ． cut short2 ． (2016· 山东青岛中考 )Our country is taking action to air pollution.A ． cut down B ． cut upC ． cut out D ． cut off考点二 表示“花费”含义的单词辨析【课文原句】 It's good for health and it doesn't cost anything ！它对健康有益而且不花钱！ ( 九 P98)cost, spend, take, pay 表示“花费”的区别词汇用法cost事 / 物＋ cost ＋人＋时间 / 金钱；还可以强调抽象的代价spend人＋ spend ＋时间 / 金钱＋ (in) doing/on sth.takeIt ＋ takes ＋人＋时间＋ to dopay人＋ pay ＋金钱＋ for ＋物3 ． (2017· 山东济宁中考 )That one mistake almost him his life.A ． took B ． paid C ． cost D ． spent考点三 be harmful to 的用法【课文原句】 This is not only cruel, but also harmful to the environment. 这种做法不仅残忍，而且对环境有害。 ( 九P99)be harmful to 意为“对……有害”，相当于 do harm to 或be bad for 。Smoking is harmful to our health. ＝ Smoking does harm to our health. ＝ Smoking is bad for our health. 吸烟对我们的健康有害。4 ． (2018· 福建泉州质检改编 )—The farm chemicals re...
