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课件网) Uni4 key sentence structures Learning aims: 1.To grasp the key sentence structures： （动名词做主语、（句首倒装）not only ....but also、不定式作定语） 2.To translate and make sentences with them 1.【句式点拨】动名词短语作主语 (1)单个的动名词(短语)作主语时，谓语动词要用单数形式。一般来说，动名词(短语)作主语表示一种抽象的或泛指的动作。 (2)下列句式中it是形式主语，动名词短语是真正的主语： It is no use/good/point/harm doing sth.做某事是没有用处/好处的。 It is a waste of time doing sth.做某事是浪费时间。 It is worth doing sth.值得做某事。 【练一练】 (1)_____can help keep blood pressure levels down.吃这些食物有助于保持低的血压水平。 (2)__Learning to use deepseek_____ will help you solve many academic problems.学习用Deepseek将帮助您解决许多学术问题。 Eating these food 1.【句式点拨】动名词短语作主语 【练一练】 (3).Growing green vegetables _gives____(give)me a sense of accomplishment. 种植绿色蔬菜会给我一种满满的成就感。 (4). _Facing these challenges____ will show you what you're made of. 面对这些挑战会让你清楚自己究竟有多大能耐。 (5)It is no good ___talking____ （talk） about the same thing all the time. 一直谈论同样的事情是没有好处的。 (6)It is a waste of time ___arguing____ （argue） with Bill. 与比尔争论是浪费时间的。。 ①He is always the last ___to leave_____ (leave) the classroom. ②Lang Ping became the first person in volleyball ___to win_____ (win) an Olympic gold medal as both a player and a coach. ③The girl is the best person ___to finish_____ (finish) the whole work. ④A build-it-yourself solar still is one of the best ways _to obtain_____ (obtain) drinking water in areas where the liquid is not readily available. ⑤Friedman points out that the green economy is a chance ____to keep____(keep) American strength. 不定式做定语 ⑥It was the first play ____to win_____ (win) all three of these major awards. ⑦I don’t trust his promise _____to come_____ (come)for a visit. ⑧The next thing _____to do_____ (do) is to keep the machine on for five minutes. ⑨She is ___the first woman to work_____ (第一个工作的女性) in the desert. ⑩William is ___the last person to tell a lie_ (最不可能说谎的人). 不定式做定语 not only … but also … 可用于连接两个分句，并且not only位于句首时，第一个分句中的主语和谓语要部分倒装，即将谓语的一部分（如助动词、情态动词或系动词）置于主语之前。 Not only does the sun give us light but also it gives us heat. 太阳不仅给予我们光，而且给予我们热能。 Not only did he speak English correctly, but also he speaks it fluently. 他英语不但说得准确，还讲得流利。 Not only is this young man clever but also he is hardworking. 这个年轻人不但聪明，还勤奋。 1. 两个主语 Not only Mr Lin but also his son joined the Party two years ago. 两年前，林先生和他儿子都入党了。 2.连接两个谓语动词 I not only play tennis but also practise shooting. 我不但打网球，还练习射击。 3.连接两个地点状语 They speak English not only in class but also in the dormitory. 他们不但在班里讲英语，在宿舍也讲英语。 not o ... ...
