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，didnt he？2）They usednt 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usednt. 结构为：主语+ used not to do sth. 或主语+ usednt to do sth. 2）借助于助动词didnt，其结构为：主语+ didnt use to do sth. 例如：He used not to get up early.= Heusednt to get up early. = He didnt 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）Ive 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。Youll 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 friends homework,but now I dont.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. Dont 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