My watch is nowhere to be found,I must have dropped it when I was on the bus为什么是to be found

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My watch is nowhere to be found,I must have dropped it when I was on the bus为什么是to be found

My watch is nowhere to be found,I must have dropped it when I was on the bus为什么是to be found
My watch is nowhere to be found,I must have dropped it when I was on the bus
为什么是to be found

My watch is nowhere to be found,I must have dropped it when I was on the bus为什么是to be found
由于watch是物,所以用被动语态,其结构为be+动词过去式,所以是is (to be found),
不定式作表语表示具体动作或将来动作;动名词作表语表示抽象的一般行为.
to be found表示强调“找”这个动作,being found表示一般行为,即一直都在找.其差别在于这里强调找不到这个动作

系动词(is)后面跟动词不定式!

那用什么呢?
being found?没有强调正在发生的事情。
不用动名词,就只能不定式了阿。
这个应该是记忆的东西,没有什么为什么的,语法书上就是这么写的。