Mr Smith likes watching his grandson ( A) at the pool.A swim B swims Cswam D to swim 为什么不能选Mr Smith likes watching his grandson ( A) at the pool.A swim B swims C swam D to swim为什么不能选B和C?grandson是三单,为什么不能加s?

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MrSmithlikeswatchinghisgrandson(A)atthepool.AswimBswimsCswamDtoswim为什么不能选MrSmithlikeswatchinghisgran

Mr Smith likes watching his grandson ( A) at the pool.A swim B swims Cswam D to swim 为什么不能选Mr Smith likes watching his grandson ( A) at the pool.A swim B swims C swam D to swim为什么不能选B和C?grandson是三单,为什么不能加s?
Mr Smith likes watching his grandson ( A) at the pool.A swim B swims Cswam D to swim 为什么不能选
Mr Smith likes watching his grandson ( A) at the pool.
A swim B swims C swam D to swim
为什么不能选B和C?
grandson是三单,为什么不能加s?

Mr Smith likes watching his grandson ( A) at the pool.A swim B swims Cswam D to swim 为什么不能选Mr Smith likes watching his grandson ( A) at the pool.A swim B swims C swam D to swim为什么不能选B和C?grandson是三单,为什么不能加s?
由结构:watch sb.do 决定的,所以用动词原形 swim
而第三人称单数加在第一个动词 like 上了呀
不明白的再问哟,请及时采纳,多谢!

A watch sb do sth 是一句型

选择A swim
意思是:史密斯先生细化看孙子在池子游泳。
感官动词watch的宾语是his grandson,swim是宾语的补语,至于用swim的原型还是现在分词形式,要看这个补语的动作时经常性的,还是偶尔一次。
题中Mr Smith的这一爱好是习惯性的,经常性的,而不是具体一次地喜欢,所以用swim。
你说的grandson是单三,所以swim后加s,这个是不...

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选择A swim
意思是:史密斯先生细化看孙子在池子游泳。
感官动词watch的宾语是his grandson,swim是宾语的补语,至于用swim的原型还是现在分词形式,要看这个补语的动作时经常性的,还是偶尔一次。
题中Mr Smith的这一爱好是习惯性的,经常性的,而不是具体一次地喜欢,所以用swim。
你说的grandson是单三,所以swim后加s,这个是不对的,因为感官动词动词作补语时没有这种形式,只有上述我所说的两种形式。
希望帮助到你,学习进步。

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likes就不是过去时排出C
watch sb.do