they are having a great time___in the pool.横线上是填to swimming 还是swimming 为什么?急用.

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they are having a great time___in the pool.横线上是填to swimming 还是swimming 为什么?急用.

they are having a great time___in the pool.横线上是填to swimming 还是swimming 为什么?急用.
they are having a great time___in the pool.横线上是填to swimming 还是swimming 为什么?急用.

they are having a great time___in the pool.横线上是填to swimming 还是swimming 为什么?急用.
swimming,to是不定式后面要跟动词原形,这里的swimming是现在分词做状语.

swimming
have a good time doing 可以当短语记忆
也可以用非谓语来解释
句子中谓语 are 所以swim 要用非谓语
非谓语动词Ing表主动 to do 表目的或者将来
swimming 是主动哦
又看到这道题了呢~
希望能帮助到你~^ ^谢谢,你的分析,很容易让我理解哈。...

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swimming
have a good time doing 可以当短语记忆
也可以用非谓语来解释
句子中谓语 are 所以swim 要用非谓语
非谓语动词Ing表主动 to do 表目的或者将来
swimming 是主动哦
又看到这道题了呢~
希望能帮助到你~^ ^

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