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Unit 2 Teenagers should be allowed to choose their own clothes. 1. 能够默写出本单元单词、词组,熟练英汉互译,能准确书写,准确运用; 2. 理解并记住被动语态与情态动词的基本结构; 3. 记住重点句型的构成及重要知识点,能准确运用。 词汇填空 1. I _ (educate) to be a kind and helpful person from a young age. 2. Failure is the mother of _ (succeed). 3. They are all against _ (build) a new zoo in the city. 4. He didn’t sleep well, so he is very _ (sleep) now. 5. Please keep _ (silently). The teacher is coming. 1.英语有两种语态:主动语态和被动语态 主动语态表示主语是动作的_;被动语态表示主语是动作的_。 Cats eat fish. (主动语态)猫吃鱼。 Fish is eaten by cats. (被动语态) 鱼被猫吃。 2.被动语态的构成:由“助动词be +及物动词的过去分词”构成 助动词be 有人称、数和时态的变化,其变化规则与be 作为连系动词时完全一样。 时态 被动语态结构 例句 一般现在时 am are +过去分词 is English is spoken in many countries. 一般过去时 was +过去分词 were + 过去分词 This bridge was built in 1989. 情态动词 can/should may +be+过去分词 must/…… The work must be done right now. 3.被动语态的用法 当我们不知道谁是动作的执行者,或者没有必要指出谁是动作的执行者,或者只需强调动作的承受者时,要用被动语态。 【练习】 1. - There is a lot of wind in North China. -Well, more trees _ every year to stop the wind. A. must be planted B. should plant C. can plant 2. -Do you believe there’s aliens? -I’m afraid not. I don’t think aliens _ in space. A. can find B. can be found C. can be founded 3. 所有的工作必须今天完成。All the work _ _ _ today. 4. 青少年不应该被允许吸烟。Teenagers _ _ _ _ _ _. 1. Teenagers should be allowed to choose their own clothes. 【解析】① allow sb. to do sth. 允许某人做某事(主动语态) Mother _ TV every night. 妈妈允许我每晚看电视。 ② Sb. be allowed to do sth. 被允许做某事(被动语态) Lily _to Qinzhou. 莉莉被允许去钦州。 2. I don’t think sixteen-year-olds should be allowed to drive. 【解析】sixteen-year-old 复合形容词,“十六岁的”;sixteen-year-olds 名词,“十六岁的孩子们” 【练习】-Is Mike _? - No, he is a _ boy. A. eleven years old;twelve years old B. eleven years old; twelve-year-old C.eleven-year-old; twelve years old D. eleven-year-old; twelve-year-old 3. get their ears pierced 穿耳洞 【解析】让/使(别人)做某事 get sth. done(过去分词) have sth. done 【练习】 ①-My eyesight is getting worse these days. I’d like to have my eyes _. -Perhaps you should consider_ the time on the computer. A. Checked; to reduce B. to check; redu