江苏省常州市西夏墅中学 2012-2013 学年高一英语学案：Module5 Unit1 Grammar---动词不定式与动名词（外研版必修 1）I Learning aims 1.掌握动词不定式 “to”与 “v-ing”的常规用法。2.熟悉不定式符号 “to”的省略情况。3.灵活运用动词不定式与动名词的时态、语态及否定形式。4.区分一些动词后+ “to do”与 “doing”的不同意思。5.掌握动名词复合结构的用法。II Learning proceduresStep 1 Different functions of To-infinitive⒈ 作主语 动词不定式作主语时，句子的谓语动词常用单数，其位置有以下两种：(1)把不定式置于句首。如： To get there by bike will take us half an hour. (2)用 it 作形式主语，把真正的主语不定式置于句后，常用于下列句式中。如： It's our duty to take good care of the old. It is difficult for us to finish writing the composition in a quarter of an hour. It is stupid of you to write down everything the teacher says. It is necessary to read English every day.2.作宾语 ① 以下动词后，只能跟不定式作宾语。如：agree, ask, aim, arrange, choose, decide, demand, expect, fail, help, hope, lean, long, manage, offer, plan, prepare, pretend, promise, refuse, wish。如： I decided to ask for my money back.When our visit to the farm was over, we expected to start back on foot. ② 当复合宾语中的宾语是不定式时，先用形式宾语 it 代替不定式，把不定式置于补语之后，即：主语＋动 词＋it＋补语＋to do 句式。如： We think it quite important for us to learn a foreign language well. He feels it his duty to help the poor.3. 做表语 不定式作表语表示具体动作或将来动作，跟在 be 动词后面.1①His wish is to become a lawyer. (不定式 to become a lawyer 在连系动词 is 后做表语) ② My chief purpose is to point out the difficulties of the matter. ③ What I would suggest is to put off the meeting. 4. 作定语 不定式在句中作定语，置于被修饰的名词或代词之后。如： The next train to arrive is from Washington. (不定式 to ar...
