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1、不定式和动名词作主语的区别不定式和动名词作主语的区别1.不定式作主语经常表具体的动作，常与特定的连用。动名词作主语经常表示抽象的动作，一般不与特定的执行者连用。（动名词主要强调一种现象）。Eg.Doing exercise is good for our health.(抽象）To do some exercise is good for you.（具体）It is not very good for you to smoke so much.（具体）Smoking is bad for our health.To smoke is not good for you.Climbing moun
2、tains is interesting.It is interesting for him to climb mountains.Driving a car during the rush hour is tiring.(B)is a good form of exercise for both young and old.(指现象）A.The walkB.WalkingC.To walkD.Walk2.Its no good/use/fun+doing sth.eg.Its no use talking to him again.Its no good eating too much fa
3、t.但如果加了执行者，应该用：Its no good for you to eat too much fat.1.不定式作主语经常表具体的动作，常与特定的连用。动名词作主语经常表示抽象的动作，一般不与特定的执行者连用。（动名词主要强调一种现象）。Eg.Doing exercise is good for our health.(抽象）To do some exercise is good for you.（具体）It is not very good for you to smoke so much.（具体）Smoking is bad for our health.To smoke is n
4、ot good for you.Climbing mountains is interesting.It is interesting for him to climb mountains.Driving a car during the rush hour is tiring.(B)is a good form of exercise for both young and old.(指现象）A.The walkB.WalkingC.To walkD.Walk2.Its no good/use/fun+doing sth.eg.Its no use talking to him again.I
5、ts no good eating too much fat.但如果加了执行者，应该用：Its no good for you to eat too much fat.3.It is dangerous climbing a tree.3.It is dangerous climbing a tree.It is terrible not being allowed to smoke at all.It is terrible not being allowed to smoke at all.It is nice helping other people.It is nice helping
6、 other people.It is interesting planning a holiday.It is interesting planning a holiday.但但 important,necessary,possible,impossible.important,necessary,possible,impossible.等形容词不能用上述结等形容词不能用上述结构：构：eg:Its important learning foreign languages.(eg:Its important learning foreign languages.()Its important to learn foreign languages.(Its important to learn foreign languages.()4.4.主语与表语必须一致。主语与表语必须一致。Eg.To see is to belive.Eg.To see is to belive.()Seeing is believing.Seeing is believing.()