Unit 1 Art Discovering Useful Structures 不定式作表语 高中英语人教版（2019）选择性必修第三册.pptxVIP

Unit1Art动词不定式作表语

1.Hisdreamistobecomeadoctor.2.Mydutiesaretodeliverletters.3.Whathewantsistosolvetheproblem.4.Mynextplanistohaveagoodrest.以上句子中的画线部分为_______________，且在句中都充当了______语。动词不定式短语表

【位置】不定式作表语,位于系动词之后1.状态类:be动词;keep,remain,stay,2.感官类:look,feel(摸起来),smell,sound,taste3.变化类:become,grow,turn,get,go,come,run,fall4.像类:seem,appear,5.终止类:turnout结果是,prove证明是

【含义】1.解释主语的内容(行为)；(表将来)2.说明主语行为带来的结果;

常用不定式作表语的情况1.主语是建议:suggestion,advice,proposal目标与计划:aim,goal,purpose,plan梦想与希望:dream,wish,hope职责与工作:duty，job

Mydreamis___________(become)apainter.MysuggestionaboutimprovingEnglishis__________(memorize)wordseveryday.Mydutiesis____________(help)mystudentsimprovetheirEnglish.Mynextplanis____________(take)partinacompetition.tobecometomemorizetohelptotake

2.以What引导的主语从句，常用不定式作表语，说明主语的内容。WhatIsuggestistoaskyourfriendsandteachersforhelp.Whathewantsistosolvetheproblem.Whatmattersmostistoconcentrateonyourfavouritethings.

3.当主语包含定语从句,且先行词为代词all,或者主语被序数词、或theonly,thelast或形容词最高级(themost,theleast)时，其后可接“系动词+不定式”作表语Allhewantedwastositonthegrassanddrinksomewater.TheleastIcanexpectistohavethisdayalltomyself.至少我能期待这一天是属于我自己的。

不定式作表语，可以省略to的情况当主语部分含有动词do的某种形式时,作表语的不定式可以省略。1.what引导的主语从句，含有do的某种形式E.g.Whattheyattemptedtodowasnolongershowreality,butinsteadtoaskthequestion,“whatisart?”前有do,后省to

2.all作主语，其后的定语从句中，含有do的某种形式。E.g.Allweneedtodoisliveeachdaywithhope.3.主语被序数词、最高级或theonly,thelast等修饰,且其后的定语从句含有do的某种形式。E.g.Theonly/firstthingthatweshoulddonowislearn.Thebestthingthathedidisfacethedifficultybravely.

Allyouneedtodois(to)rankyourbooksprecisely.Thethingforustodois(to)attempttoachieveabreakthrough.ThefirstthingIhavetodois(to)conveymythankstoyou.

不定式作表语和动名词作表语原则1:形式上，最好保持一致Toseeistobelieve.