On being observed,it immediately ran away.新概念On being observed也可以写作On the time when it is being observed若是on her being observed,为什么不能用having been observed 代替?
2019-04-30
On being observed,it immediately ran away.新概念
On being observed也可以写作On the time when it is being observed
若是on her being observed,
为什么不能用having been observed 代替?
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on doing的意思是一...就...换后面的那个写法是不对的
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on doing的意思是一...就...换后面的那个写法是不对的
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