Does he usually ()in summer?A swim B to swim B swimming选哪个?请回答原因,

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Does he usually ()in summer?A swim B to swim B swimming选哪个?请回答原因,
Does he usually ()in summer?A swim B to swim B swimming
选哪个?请回答原因,

Does he usually ()in summer?A swim B to swim B swimming选哪个?请回答原因,
A
他夏天经常游泳吗?
这里时一般现在时的一般疑问句,所以必须用动词的原型.其它的都不是原型,不对!
回答完毕,跪谢恩赐!

A swim Does 是助动词,后面接动词原形。

A 前面有does了,后面动词要用原形

A
一般疑问句还原应该是 he swims in summer.
改为一般疑问句是借助于组动词does, 因为does已经表示出了第三人称单数的特性,所以swims要变回原形。

A(选择动词原形)