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牛津上海版英语高二下册《Appendix》优质课教案
作主语 可以直接作主语。
如: To see is to believe. 但在英语中,常用it作形式主语,真正的主语即动词不定式放在后面。如: It's wrong to play tricks on other people.
It's our duty to keep our environment clean and tidy.
规律:动词不定式在句中作主语时,it仅作形式主语。
如:It is +adj.(形容词)+to do sth.或 It is +n.(名词)+to do sth.
作宾语
want,decide ,agree等动词后面跟并且只能跟不定式。
如: We agreed to start early. She wants to be a doctor.
love,like ,begin,start,hate ,prefer等词后面可以接不定式,还可以接动名词,意思无很大区别。
提示:like doing指经常性动作,而like to do指一次性的动作。
如: I like swimming, but I don't like to swim now.我喜欢游泳,但我现在不想游。
特别注意: stop,forget,remember,go on ,try等词或短语后面可以接不定式。
但后面接不定式和接动名词意思大不相同。
如: 1)stop to do sth.停止一件事,去做另一件事。
Stop doing sth.停止正在做的事。
比较:When the teacher came in, the students stopped talking;当老师走进来时,学生们停止说话;
when he came out,the students stopped to talk. 当老师走出去时,学生们又开始说话。 2)思考:forget,remember,go on,try等词或短语后面接不定式和动名词用法有何区别?
在find/feel+it+adj.+to do sth.句型中,it是形式宾语,真正的宾语是后面的动词不定式。
如: The man downstairs found it difficult to get to sleep.
I feel it easy to recite the text.
3. 作宾语补足语
tell,ask,want,order,teach,invite,warn,wish,help,get,wish,help等词后面常接不定式作宾补。如: I tell him not to go there by bus .
Edison's mother taught him to read and write.
let,make,have,see,hear,feel,watch, notice后面接不带to的不定式作宾补。
如: The boss makes them work 16 hours a day.