happen to be doing
和happen to do
区别在于第一个强调动作在进行时,第二个不是.
例如：
He happens to be visiting the place.（强调visit当时 在进行中）
他现在正巧在访问这个地方.
I happened to meet him this morning
今天上午我正巧碰到他.
happen to be doing
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相关问题
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happen to do和happen to be doing
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happen to do or happen doing?
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4,happen to do sth
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happened to do when造句
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do you know what happened to her,do you know what she happen
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求there happens to be例句
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happen to do sth 不是等于 by chance to do
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翻译:I happened to be at the station ,when it happened
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will \be doing to do \be about to do \be to do的区别
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be use to do ,be worth to do ,be willing to do ,hope to do 的