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So I was watching a show and they say,
And I got confused as to why they used 用 in it.
Is it the same when you don't use 用 in that sentence? Like,
你不用留爸爸 means "you don't need to/have to try to make dad stay"
你不留爸爸 would mean "you don't try to make dad stay", so more like stating a fact.
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