Unit 5 Learning from nature非限定动词作主语、宾语和表语一、动词的非限定形式(即非谓语形式)作主语[观察例句]1 ． Knowing basic firstaid techniques will help you respond quickly to emergencies.2．It is no use complaining without taking action.3．To climb the mountain is hard work but to go down the mountain is great fun.4．It is not easy to find your way around the town.[归纳用法]1．ing 形式作主语表示一般的、抽象的、泛指的概念，常用 it 作形式主语。常用于固定句型 ： It's a waste of time doing... ； It's no use/good doing... ； It is useless doing...；There is no...等中。2．不定式作主语，一般表示具体某一次的动作。常用 it 作形式主语。3．it 作形式主语时，不定式或ing 形式是真正的主语，放在句子后部，以使句子保持平衡。[即学即练 1] 单句语法填空①His coming(come)late made the teacher very angry.②It is no use crying(cry)over spilt milk.③To see(see)is to believe.④It is important to respect(respect)people.二、动词的非限定形式作宾语[观察例句]1．My English teacher promised to lend some books to me.2．We only missed seeing each other by five minutes.3．Do you mind being interrupted while studying?4．My mother couldn't help smiling when she heard the good news.[归纳用法]1．下列动词后只能用不定式作宾语，请牢记下面的口诀：决心学会想希望，拒绝设法愿假装。主动答应选计划，同意请求帮一帮。decide/determine，learn，want，expect/hope/wish; refuse，manage，care，pretend; offer，promise，choose，plan；agree，ask/beg，help，afford，strive，happen，wait，threaten等2．下列动词或动词短语后只能用ing 形式作宾语，请牢记下面的口诀：考虑建议盼原谅，承认推迟没得想。避免错过继续练，否认完成就欣赏。禁止想象才冒险，不禁介意准逃亡。consider，suggest/advise，look forward to，excuse/pardon; admit，delay/put off ， fancy( 想 象 ， 设 想 ); avoid ， miss ， keep/keep on ， practice; deny，finish，enjoy/appreciate; forbid，imagine，risk; can't help，mind，a...
