Unit 2 Topic 3 语法和知识点默写 短语 为..效力 work for 纸的两面 two sides of paper 鼓励某人去做某事encourage sb.to do 应该 ought to 做一个更环保的人be a greener person 关闭 shut off 代替，而不是 instead of 短距离 a short distance 说比做简单 Easier said than done. 行动胜于雄辩 Actions speak louder than words 寻找 look for 之一 one of 太...而不能 too...to 花费...时间去做 it takes sometime to do 用光，用尽 run out 从...中移除 remove from 用..去做 use sth.to do =use sth.for doing 被用于去...be used to do=be used for doing 语法 Ought to=should意为应该 例如： We should protect the environment. We _____ _____ protect the enviornment. 否定：ought not to=oughtn't to 并列句 并列句：由简单句连接的两个或者两个以上的简单句。 ①并列关系 用and, not only...but also...,both...and,neither..nor...等连接； 她英语学得好，她经常帮我学英语。 She learns English very well _____ she often helps me with my English. 我们不但去了天安门，而且还参观了长城。 We _____ _____ went to the Tianan’men Squre, _____ _____ visited the Great Wall. ②转折和对比关系 用but，while, yet等连接。 他比你高，但是比你小。 He is taller than you, _____ he is younger than you. 我外公喜欢喝茶，而我外婆喜欢喝咖啡。 My grandpa likes drinking tea, _____ my grandma likes drinking coffee. ③选择关系 用or，或者either...or等连接。 你可以待在那，或者你可以离开。 You can stay there, _____ you can leave now. 你要么说实话，要么什么也别说。 _____ you tell the truth, _____ you say nothing. ④因果关系 用so或for连接。 我错过了末班车，所以不得不步行回家。 I missed the last bus, _____ I had to walk home.
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