used-to-do-讲解.doc

used to do 过去常常做某事
Sb+be used to doing 习惯于做某事
Sth+be used to do sth被用来做某事
1. used to的一般疑问句有两种构成方法：
1）将used提前至句首，结构为Used + 主语+ to do sth...?
2）将did提前至句首，结构为：Did + 主语+ use to do sth...?
例如：Used he to get up early? = Did he use to get up early?
2. used to的反义疑问句有两种构成方法，例如：
1）He used to smoke，didn't he？
2）They usedn't to like opera，did they？
3. 同样，其否定句也有两种构成方式：
1）直接在used后面加上not，也可一起缩写成usedn't. 结构为：主语+ used not to do sth... 或主语+ usedn't to do sth...
2）借助于助动词didn't，其结构为：主语+ didn't use to do sth.... 例如：
He used not to get up early.= Heusedn't to get up early. = He didn't use to get up early.
4、be（get，become）used to结构在意义上相当于accustomed to“习惯于”，从形态上看，
used是个分词型形容词，to是介词，因此后面只能跟名词、代词或动名词。例如：
1）They got used to living in the countryside．他们已习惯于住在农村。
2）I've got used to being a vegetarian．我已经习惯吃素食。
3）He is used to hard work．他习惯于艰苦工作。
5、be used to表示“习惯于某事”的状态，而get used to则表示由“不习惯”到“习惯于”这一动态的过程，意思是：“（变得）习惯于”；“开始习惯于”。试比较：
He was used to the cold weather after he lived there for two years．
在那里住两年后，他已习惯了寒冷的天气。
I think it is a bit difficult for you to get used to the humid weather here．
我想，让你习惯于这里潮湿而炎热的天气有点困难。
You'll soon get used to living in the country．
很快你就会习惯于住在乡下了。
6、当主语是物的时候是指被用来做某事，be used to是动词use的被动语态，在这种结构里，to是不定式符号。例如：
A metal bar was used to force the door open．
用金属棒把门撬开。
The threshing ground was used to hold a mass meeting．
打谷场曾用于举行群众大会。
一、用所给单词的适当形式填空：
1.We used to ___ (go ）swimming last year.
2.I am used to ____（run）every morning.
3.Bamboos are used to ___(build) houses there.
4.They have been used to ______(live ) in the countryside.
5.I used to _______(copy ) my friend’s homework,but now I don’t.
6.He used to _______(read) in the day,but now he is used to________(read) at night.
7.Computers are used __________(help) people do many things.
8. Don’t use the bike over there, It is not used to________(ride).
二、根据汉语意思完成句子：
1.I _________________the food here.(我习惯于吃这儿的食物.)
2.Tom_____________here.(汤姆曾在这儿住过.）
3.I ___________in the river when I was a child.(我小时候常常去河里游泳.）
4.Wood _____________paper.(木头可以用来造纸.)
5.My sister used to go to school on foot. (划线部分提问)
How_______your sister_______ _______go to school?
6.My mother used to walk after supper .(改为一般疑问句)
_______ your mother _____ _______ ______ after supper ?
7. Mr Smith used to smoke.（完成发意疑问句）
Mr Smith used to smoke ,_______ _______?
8. The little girl often wear a skirt in the past.（改为同义句）
The little girl Mike_______ _______ wear a skirt.
9. Mike used to play soccer at school. (改为否定句)
Mike _______ _______ to play soccer at school.
10. She usedn’t.to have short hair , _______ _______?（完成发意疑问句）