John __(learn)English on his holiday.用适当形式

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John __(learn)English on his holiday.用适当形式
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John __(learn)English on his holiday.用适当形式
John __(learn)English on his holiday.用适当形式

John __(learn)English on his holiday.用适当形式
根据情景填充,得区分时态,语态!表示正在发生,还是过去,表示状态还是什么,如果是一般事实说明,就用一般现在时,learns.如果是过去完成,has learned.表示过去进行,was learning.表示将来 will learn.将来进行就是is learning