____football is very exciting A.to play B.playing选 哪个?为什么?两个都可以吗?为什么不选A？我知道要用动名词做主语，可不定式也可以用做主语的。到底哪种解释是权威的呀？

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____footballisveryexcitingA.toplayB.playing选哪个?为什么?两个都可以吗?为什么不选A？我知道要用动名词做主语，可不定式也可以用做主语的。到底哪种解释是权威的

____football is very exciting A.to play B.playing选 哪个?为什么?两个都可以吗?为什么不选A？我知道要用动名词做主语，可不定式也可以用做主语的。到底哪种解释是权威的呀？
____football is very exciting A.to play B.playing选 哪个?为什么?两个都可以吗?
为什么不选A？我知道要用动名词做主语，可不定式也可以用做主语的。到底哪种解释是权威的呀？

____football is very exciting A.to play B.playing选 哪个?为什么?两个都可以吗?为什么不选A？我知道要用动名词做主语，可不定式也可以用做主语的。到底哪种解释是权威的呀？
放在句首做主语的时候要用动名词形式
比如Seeing is believing!
不定式做主语表示的不是一般性的动作或状态,而是特定场合发生的事情.
比如To atten so many meeting is exausting.

Playing表主动。

B
动词放于句首应用ing形式；如果是原型，表示这句话是祈使句；to play的话表示为了玩，有一种目的性

to do, doing都是非谓语，都可以做句子主语。
表示一贯的，用doing（如Studying English is my favorite .再例如 Playing football is very exciting .）；表示一次的，或者有目的性的用to do （如To help him is my duty）．

B
必须用playing.playing football用在句首作主语，动词必须用ing形式，这是固定用法

playing 正确，因为playing football在些句中作主语

Playing才对！

My best friend is very funny.（对划线部分提问） _____your best friend _____?Paul,than,is ,at,skating,Eddir,better.(连词成句) _______________.Jim can play football well.(改为同义句)Jim is _____ ____ ____football.Wang Lin's doesn't wo ____football is very exciting A.to play B.playing选 哪个?为什么?两个都可以吗?为什么不选A？我知道要用动名词做主语，可不定式也可以用做主语的。到底哪种解释是权威的呀？ What about ____football now? Very silly is very is very ____man in a black hat is my p.e.eacher.He often plays ____football with us.____man in a black hat is my p.e.teacher.He often plays ____football with us.A.The;a B.The;/ C.A; the D.A;/ My brother likes ____football in the afternoon 看汉语意思填空,一空一词1.咱们去踢球吧___go___ ____football.2一些人认为学好英语是困难的Some people think it is ___ ___ ___English well. She is very young Your watch is very Your tighting is very You is very silly jim is very ( ) (fun). He is very fun. She is very small. is o______ very busy. The sky is very It is very hot