是'i am good at swim'还是'i am good at swimming'?

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是''iamgoodatswim''还是''iamgoodatswimming''?是''iamgoodatswim''还是''iamgoodatswimming''?是''iamgoodatswim''还是''iamgo

是'i am good at swim'还是'i am good at swimming'?
是'i am good at swim'还是'i am good at swimming'?

是'i am good at swim'还是'i am good at swimming'?
no,no,no!不要被误导了,我们可以说 "go for a swim(名词)" OR "have a swim(名词)"
但是at是一个介词,后面应该跟一个动词ing形式,所以是"i am good at swimming."
当然介词后面也可以加名词,例如"i am good at study."

是i am good at swimming'

是'i am good at swiming' swim 本身可以做动词用的 加了
ing 可以做名词用 和read study一样

I am good at swimming .

I am good at swimming.
At是介词,后要跟动名词.

swim(n.)和swimming分别是swim(vi.)的同根名次和动名词,都是名词可以做宾语嘛,所以都是对的。

I am good at swimming.

'i am good at swimming

be good at 中 at是介词 后面接动词的 ing形式·