1、观察划线部分的特点I asked the boy to answer my question.Toms attending the meeting made everyone there very happy.To learn maths is not easy./It is not easy to learn maths.Seen from the hill,the city looks very beautiful.The girl sitting under the tree is my sister.doingdoingdoneto do构成：to+动词原形不定式的时态和语态（do)主
2、动 被动 现在原形 进行式 无 完成原形进行式 无语态时态to doto be doneto be doingto have doneto have been doneto have been doing否定式：否定式：在不定式前加在不定式前加 not not 1.我有很重要的事情要告诉你。I have something important to tell you.2.那个男孩喜欢玩电脑游戏。The boy likes to play computer games.3.为了通过考试，我更加努力学习。To pass the exam,I work even harder.不定式的用法1.学英语
3、对于我们来说不是很难。It is not difficult for us to learn English./To learn English is not difficult for us.2.小男孩很想学英语。The boy wanted to learn English.3.他的爱好是打篮球。His hobby is to play basketball.4.我没有东西吃。I have nothing to eat.5.为了赢得比赛，他刻苦练习。To win the game,he works hard.6.我很高兴见到你。I am very glad to see you.7.爸爸叫
4、他进来。Father asked him to come in.宾宾语语主主语语宾宾语语补补足足语语状状语语定定语语表表语语不不定定式式 7135642一、不定式作主语一、不定式作主语Eg.吸这么多烟对你的身体不好。(具体)To smoke so much is not good for you./Its not good for you to smoke so much.不定式作主语表示的动作往往是具体的或一次性的动作不定式作主语表示的动作往往是具体的或一次性的动作，特别是将来的动作。常用，特别是将来的动作。常用It 作形式主语作形式主语(注意句型：注意句型：It is+adj.+for/o
5、f sb to do sth.)Eg.你真好，帮助我学习英语。你真好，帮助我学习英语。It is very good of you to help with my English.二、不定式作宾语二、不定式作宾语1.爸爸答应给我买一辆单车。爸爸答应给我买一辆单车。My father promised to buy a bike for me.2.天啊！天啊！我忘了关灯了。我忘了关灯了。Oh,My God!I forgot to turn off the light.注意：下列动词或动词短语后接不定式注意：下列动词或动词短语后接不定式：advise,agree,seem,appear,offer
6、,happen,wish,hope,pay,expect,long,plan,intend,promise,pretend,decide,afford,manage,choose,be said to,would like to等。三、不定式作宾语补足语三、不定式作宾语补足语1.医生建议他每天锻炼身体。The doctor advised him to take exercise.2.他的父母期望他上大学。His parents expected him to go to university.四、不定式作定语四、不定式作定语1.最后一个来到达的人要付账。The last one to com
7、e pays bill.2.下一列到站的火车是从纽约开来的。The next train to arrive was from New York.注意：（1）不定式作定语的位置：（2）所表示的时间：放在名词的后面将来 五、作表语1.我今天必须做的事情是打扫房间。What I must do today is to clean the room.2.他的任务是送信。His task is to send letters.注意：不定式表示一次性的；具体的动作六、动词不定式作状语六、动词不定式作状语1.表示目的表示目的（1 1）我在存）我在存钱买电脑钱买电脑。Im saving upIm savin
8、g up to buy a computer to buy a computer（2 2）我要把他的）我要把他的电话号码记电话号码记下下来来，以防忘，以防忘记记Ill write down his telephone number Ill write down his telephone number（so asso as）not tonot to forget it.forget it.2.2.表示表示结结果果他的他的视视力太差了，看不力太差了，看不清这么清这么小的字。小的字。His eyesight is His eyesight is tootoo poor poor to to rea
9、d such small letters.read such small letters.3.3.表示原因表示原因(一般放在形容一般放在形容词词后面）后面）我很高我很高兴兴遇到遇到你你I am very glad to meet youI am very glad to meet you.(高考链接高考链接）1.(09.广州一摸）On their return the father asked his son _(explain)what he had learnt.2.My advisor encouraged me _(take)a summer course to improve my
10、writing skills.(2004.Beijing)3.I dont know whether you happen _(hear),but Im going to study in the U.S.A this September.(2004.Liaoning).4.The flu is believed _(cause)by viruses that like to reproduce in the cells inside the human nose and throat.(2004.shanghai)5.He seems _（punish)by his teacher yest
11、erday.(09.高考模拟）6._(save)the badly sick lady,the doctor had an operation on her.7.He was too frightened _ (say)anything.8.The school ordered all the classroom_ (clean).to explain to take to have heardto be causedto have been punishedTo saveto sayto be cleanedExercise:1.He is said _(allow)to return to
12、 his country because a new president comes into power.2.He spoke in such a high voice _ (hear)at the further end of the room.4.To play fair is as important as _(play)well.5.We agreed _(meet)here but so far she hasnt turned up yet.6.Rather than ride on a crowded bus,he always prefers _(ride)a bicycle
13、.7.The boy wanted to ride his bicycle in the street,but his mother told him _(do).8.Ill do whatever I can _ (improve)my English.9.My grandmother seems to have a lot _(worry)about.10.You shouldnt allow students _(play)games near the classroom,for its too noisy.to be allowed(as)to be heard to playto i
14、mprove to meetto ridenot to doto worry aboutto play 11.I had meant _(call)on you,but I was so busy.12.To know what is good and _(do)what is right are two different things.13.You must have taken a lot of trouble _ _(find)this materials for us.14.He was afraid _(go)forwards because he was afraid of fa
15、lling down.15.I hate _(hear)their complaints all day.One of these days,I will tell them what I really think.16.The way they talked _(settle)the problem seemed impossible.17.He let me repeat his instructions _(make)sure that I understood what was _(do)after he went away.18.Paul doesnt have to be made _(learn).He always works hard.19.My cousin has passed the entrance examination.My family sent him an E-mail _(congratulate)him on his success.to callto doto findto goto have heardto settleto maketo be doneto learnto congratulate
