Suppose I write:

chopumchoHpa', ngoD tIpojchu'pu'

before you begin to accuse me, have examined the facts

Would it be correct?

Meaning that you need to have already examined the facts, before you start throwing accusations.

Of course, I could just write {chopumchoHpa', ngoDmey bopojnISchu'pu'}, but the thing I'm wondering is whether it would be right/acceptable to use aspect with imperatives.