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时态专题：不定式 教学设计
教学目标： 动词不定式的构成与用法
教学重难点： 动词不定式的用法
教学过程：
动词不定式的构成
动词不定式是由“to+do(动词原形）”构成(有时可以不带to)
其否定形式是“not+to do动词不定式”(not不与助动词连用)
动词不定式属于一种非谓语动词的形式，在句子中不能充当谓语，没有人称和数的变化，但它可以保留动词的性质，其本身可以带宾语或状语等附加成分（不定式和其附加成分称为不定式短语）。动词不定式（短语）的句法功能非常广泛，在句中可作主语、宾语、宾补语、表语、定语及状语等成分。
主语
1.单个动词不定式作主语时，谓语动词常常用单数。
To do morning exercises is good for us.
To sweep the floor is my duty every day.
2.如果动词不定式太长，常常用it 作形式主语，而将真正的主语——动词不
定式后置。
It is good for us to do morning exercises.
It is my duty to sweep the floor every day.
二.宾语 (动词+宾语）
I hope to visit the Great Wall.
常用动词不定式作宾语的动词有：
agree hope decide plan want love stop try 等。
三．宾语补足语（动词+宾语+宾语补足语)
He told me not to be late again.
常用动词不定式作宾语补足语的动词有：
tell want ask wish invite help order等。
作宾语补足语不带to的情况：
Let me go home.
一感feel
二听listen to hear
三让let make have
四看look at see watch notice
若变为被动语态，则要加上to
His father often makes him work on the farm.
He is often made to work on the farm by his father.
状语
动词不定式作状语可表示目的、原因及结果等。
Come to see me again soon.(目的状语）
I feel sad to think of the animals in danger.（原因状语）
He got to the stop to find the last bus left.(结果状语）
五.表语
词不定式往往放在be动词(或become sound taste等系动词）的后面作表语，补充说明主语的身份、性质、特征、状态。
My wish is to be a teacher.
Your job today is to clean the playground.
六．定语
不定式作定语常常放在被修饰的名词或代词之后作后置定语。
I have something to do.
He has a story to write.
动词不定式作定语必要的介词不能省.
I have no pen to write with.
The old man has no room to live in.
Exercise
1.It's hard for us English well.
A.learn B. learns C.to learn D.learning
2.He want ______some vegetables.
A.buy B.buying C.to buy D.buys
3.Mr Li often teaches his Japanese friends______Chinese food.
A.cook B. cooks C. to cook D. cooked
4.I'm sorry______you.
A. trouble B.to trouble C.troubling D.troubled
5.His dream is______ on the moon.
A.travel B.to travel C. travelling
6.He is not an easy man _____.
A.get on B.to get on C.get on with D. to get on

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