江苏省沭阳县潼阳中学译林牛津版英语选修九UNIT3 GRAMMAR 课件 .ppt

1、GrammarTo infinitiveStudy aimsvTo infinitive vBare infinitive vPracticev非谓语动词v定义：是在句子中不能单独做谓语的动词，这样的动词没有人称和数的变化。v包括：to do;v-ing,v-edv具有名词，形容词，副词的特征时态/语态主动被动一般式 to doto be done进行式 to be doing/完成式 to have doneto have been done不定式的时态和语态Guide 1:whats the function of to infinitive in a sentence?vTo infin

2、itivev在句子中可以做：v主语，宾语，定语，状语，补足语动词不定式的使用To find a best friend is difficultI need to sleep for eight hours every night.His aim was to cheer me up.I have a very important meeting to attend.You need to apologize quickly to avoid losing a good friend.I asked him to come over.主语宾语表语定语状语宾补Practice 1.在这么短的时间

3、内完成这么多作业是不可能的。2.我的任务是去完成作业。3.你有什么要说的吗?4.Betty是第一个知道这真相的人.v 1.v It is impossible to finish so much homework in such a short time.v.It is difficult to communicate with this person.v .it is hard to set up a camp in such a windy day.Can you summarize the usage of to infinitive as subject?动词不定式和不定式短语做主语时

4、，常用it做形式主语，其句型结构为：It is+形容词或名词（或词组）+不定式短语 这时的形容词常为easy,difficult,hard,good,useful,wrong,right,necessary,impossible,important 等。名词或词组常为a fact,a great day,a great thing,a pity 等。2.Do you have anything to say?:不定式做定语时，表示未做3.Betty是第一个知道这真相的人.Betty is the first one to know the truth.当名词被序数词修饰时，常用不定式作定语注:

5、动词不定式用作定语时可以放在一些名词的后面。如：attempt,ability,chance,desire,determination,decision,effort,failure,intention,need and opportunity.Guide 1:to read point2 of to infinitivevGuide 2:to read bare infinitive part and Pay attention to the following words.vLet,make,have,see.Would rather,had better,why not vThen fi

6、nish the practice belowBare infinitivev 1.I let her _(use)my dictionary.v 2.Sarah made me _ (promise)not to let out her secret.v 3.The teacher often has his students _(read)aloud in class.v 4.I saw her _ (play)basketball .v 5.I would rather _ (stay)home.v 6.You had better _(finish)your homework on t

7、ime.v 7.Why not _(go)to the concert tonight?usepromisereadplaystayfinishgov 8.She invited me to go to her house and _(watch)DVDs.v 9.Do you want to go shopping or _(watch)a film?10.I had nothing to do but _(play)computer games.11.I am determined to write rather than _(sing).watchwatchplaysingvA.有些动词

8、后面的不定式不带to，“5321”如see,watch,notice,observe,look at（五看）.make,have,let（三使）hear,listen to（二听）feel（一感）v主动省“to”，被动加“to”B介词but，except,表示“除了”后接不定式作宾语时，介词前有行为动词do，不定式省to。当主语部分有行为动词do，不定式做表语省to。“前有do，后省to”v C.两个或两个以上的不定式由连词and，or，but，rather than 连接时，第二个不定式符号to开始，往往省略。v 1.I have a large house to _ (live).v 2.

9、Please give me some paper to _ (write).v 3.Can you find me a chair to _ (sit)?v 5.Robert is said _abroad,but I dont know what country he studied in.v A.to have studied B.to study C.to be studying D.to have been studying v 6.Robert is said _abroad,but I dont know what country he studies in.v 7.Robert is said _abroad,but I dont know what country he will study in.live inwrite onsit onvQuizvPassage on page 9Keys:1.to thank 2.to apologize 3.to have 4.e-mail 5.to receive 6.to go 7.watch 8.borrow 9.visit 10.to try 11.to see 12 comevHomework:v1.words of page 9v2.hand-in assignment:vC1 on page 92.