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1、 Unit 6Birdwatching第第4课时课时We need to protect birds.动词不定式的用法动词不定式的用法一、动词不定式表示目的，作目的状语。一、动词不定式表示目的，作目的状语。1.I stayed there to see what would happen.to后面所接后面所接的的 see 是前面这个动作是前面这个动作stayed there的目的。意为的目的。意为“我我呆在那儿，呆在那儿，(目的是目的是)看看会发生什么。看看会发生什么。”2.有时为了强调，有时为了强调，可用可用in order to 或或so as to。eg：Bob took down my
2、 telephone number so as(in order)not to forget it.3.由由 in order to 引导的目的状语，既可以置于句尾，引导的目的状语，既可以置于句尾，也可以置于句首，而由也可以置于句首，而由 so as to 引导的目的状语，只引导的目的状语，只能置于句尾，而不能置于句首。比较：能置于句尾，而不能置于句首。比较：They started early in order to get there in time.(正正)In order to get there in time,they started early.(正正)They started
3、early so as to get there in time.(正正)So as to get there in time,they started early.(误误)二、动词宾语二、动词宾语 动词不定式结构，此时动词不定式可动词不定式结构，此时动词不定式可以说明宾语的情况，在句中作宾语补足语。以说明宾语的情况，在句中作宾语补足语。1.可跟不定式作宾补的动词：可跟不定式作宾补的动词：warn,tell,allow,ask,order,get,invite,wish,want,encourage等等eg：The teacher told me to clean the blackboard
4、.I want you to give me some help.2.有些感官动词有些感官动词(如如see、hear、watch、notice等等)和使役动词和使役动词(如如let、make等等)后要跟不带后要跟不带to的动词不定式的动词不定式(短语短语)作宾语作宾语补足语。总结起来有补足语。总结起来有“五看，三使，二听，一感觉五看，三使，二听，一感觉”。五五“看看”watch,see,look at，observe,notice三三“使使”make,let,have二二“听听”listen to,hear一一“感觉感觉”feeleg：I saw him play basketball wit
5、h Jack an hour ago.Let me tell you something about him.1.动词动词help后面的动词不定式可带后面的动词不定式可带to，也可不带，也可不带to。eg：She often helps me(to)do the housework.她常常帮我做家务。她常常帮我做家务。【注意】【注意】2.有些动词有些动词(如如keep)的宾语后不能接动词不定式的宾语后不能接动词不定式(短语短语)作宾语补足语，而是接作宾语补足语，而是接v.ing形式作宾语形式作宾语补足语。补足语。eg：Miss Yang keeps us reading the text fo
6、r ten minutes.【注意】【注意】3.有些感官动词有些感官动词(如如see、hear、watch、notice等等)后也后也可接可接v.ing形式作宾语补足语，强调宾语的动作正形式作宾语补足语，强调宾语的动作正在进行。试体会：在进行。试体会：I saw him playing basketball with Jack at 4:00p.m.下午四点钟的时候，我看见他正在和杰克打篮球。下午四点钟的时候，我看见他正在和杰克打篮球。When I passed by Sandys room,I heard her talking on the phone.当我经过桑迪的房间时，我听见她在打电
7、话。当我经过桑迪的房间时，我听见她在打电话。【注意】【注意】用所给词的适当形式填空1Jessicas parents always encourage her _(speak)English.2We are now inviting more people _(join)us in protecting birds.3In the end,my father let me _(watch)the video about tigers.to speakto joinwatch4The report on rare birds made us _(feel)sorry.5My mother adv
8、ised me _(not wear)leather shoes to the wetlands.6I heard the girl _(sing)an English song when I passed her room.7Hunters kill wild animals _(make)money.feelnot to wearsingingto make8We decided to put up some posters _(tell)people the importance of saving birds.9When I looked up,I saw a mother bird _(feed)her babies.10_(save)these rare birds,people are going to build more reserves for them.to tellfeedingTo save本本节节课课主主要要学学习习了了以以下下知知识识点点，请请同同学学们们及及时巩固练习：时巩固练习：动词不定式的用法动词不定式的用法