英语精品人教选择性必修三Unit1Grammar——不定式作表语

1、Section H Grammar不定式作表语单元语法 一图贯通形式不定式作表语d带2的不定式句中出现了 d<)的某种形式，如 do, doe-, did 等不带g当主语、了被以动词，空.一的不定式一作谓语的定语从句修饰时，其表语的不定式符号可省略与动名词作表语的区别不定式表示具体的或将要发生的动作动名词表示抽象或习惯性的动作语法整体突破语境理解合作探究一、动词不定式作表语的概念和用法动词不定式是非谓语动词的一种，可以放在系动词be之后作表语，通常说明或 解释主语的内容，也可表示将来的动作。合作探究阅读下列句子，体会动词不定式的用法。Ybur work is to finish a re

2、port this morning.你今天上午的工作是完成一份报告。His dream is to be a doctor after he grows up.他的梦想是长大后当一名医生。First of all, the most important thing is to conquer yourself.首先，最重要的事情是战胜自己。Always keep it in mind that your main task is to get this company running smoothly.一定要铭记你的主要任务是让这个公司平稳地运转。Maybe Lippi liimself ca

3、miot answer tliis question, so the only tiling he can do is (to) resign.也许里皮也无法回答这个问题，因此他最终只能选择辞职。What the plan does is (to) ensure a fair pension for all.这个计划要贯彻的就是保证大家都有一份合理的退休金。自主发现动词不定式是非谓语动词的一种，可以放在系动词be之后作表语，通常说明或 解释主语的内容,也可表示将来的动作。二、与动名词作表语的区别不定式作表语时，表示具体的或将要发生的动作。当主语是aim, duty, puipose, diea

4、m, goal, hope, idea, plan, suggestion 等为中心词的名词词组或以 what 引 导的名词性分句时.，不定式说明主语的内容，这时主语和表语交换位置，意思不 变。而动名词作表语时则表示抽象或习惯性的动作，说明主语的性质、状态，具 有形容词的特征。1 .不定式和动名词作表语都相当于一个名词作表语，说明主语“是什么”。My job is to paint the wall.我的任务是粉刷这堵墙。What I want to say is to put off the meeting.我想说的是推迟会议。You must keep it in mind that yo

5、ur work is serving the people.你必须牢记你的工作就是为人民服务。2 .不定式通常指一次性、具体的或将要发生的动作；动名词则指抽象或习惯性的 动作。His goal is to become a pop singer.他的目标是成为一名流行歌手。Yotu- work now is to look after the old man.你现在的工作是照看这个老人。Old Tom's present job is sweeping streets.老汤姆目前的工作是扫大街。巩固内化补全句子My cousin's wish is to become a po

6、p singer.我表哥的愿望是成为一名流 行歌手。My task tills momiiig is to serve as a guide.我今天上午的任务是充当导游。 What I want is to visit the History Museum now.我所想的就是现在去参观历史博物馆。Is your suggestion to start the work right now?你的建议是马上开始工作吗？The only way for us to survive isHvg hl hannoiiy with nature.我们生存的唯一方式就是与自然和谐相处。【名师提醒】当不定式

7、的逻辑主语是句子的主语时，表示主语的责任、义务或将来的行为；当 不定式的逻辑主语不是句子的主语时，表示主语的内容或性质。We are to keep the order in the street.我们将去街上维持秩序。（将来时）Our job is to keep the order in the street.我们的工作是维持街上的秩序。（系表结构）语言内化稳步提能课堂实践应用I .用括号内所给动词的适当形式填空1 .My next work is to construct (constmct) a nest and anchor it in a tree.2 .You know, my

8、goal is tQ Jose (lose) 150 pounds in the coming year.3 .When I was 13 my only puipose was tQ become (become) the star on our football team.4 .The first thing he did was (to) find (find) shelter from the freezing wind and snow.5 .Another way to hide a message is tQ jise (use) symbols to stand for spe

9、cific letters of the alphabet.6 . At college, Obama didn't know he was to become (become) the first black president of the USA.1 .One of the most damaging things a parent could do was (to) punish (punish) their children for poor marks.8 .Now that the factories were closed down, the city's ne

10、xt step was tQ glean (clean) the polluted river.9 .While the clip might look like part of a new ad campaign, Bridges said the only goal was tQ show (show) generosity and sympathy.10 .The puipose of education is tQ develop (develop) a fine personality in cliildren.11 .补全句子1 .The most important thing

11、about vlogging is to tell a Rood story.拍摄视频博客最重要的一点在于讲一个好故事。2 . Theultimate goal of the research istQ prevent people f oin getting th® disease.这项研究的最终目的是防止人们患这种病。3.1 gradually understand what we all need is to think jnoig about qustomeis.我渐渐明白我们需要做的是多为顾客考虑。4.The puipose of the poster is to persuade customers to buy the pioducts.这则海报的目的是说服顾客购买该产品。5 .For many computer progianimei's, their true pleasure is to crea