that depends | it (all) deˈpends
used to say that you are not certain about sth because other things have to be considered :
'Is he coming?' 'That depends. He may not have the time.'
I don't know if we can help—it all depends.
I might not go. It depends how tired I am.
'Your job sounds fun.' 'It depends what you mean by 'fun'.'
I shouldn't be too late. But it depends if the traffic's bad.