Oh, sorry you're totally right ^^"
I've mixed this verb with another word hee hee ^^"

my translation:
if she were me, I am sure, she would hang herself ages before
لو كانَت مكاني، فأنا واثقةٌ بأنها كانت ستخنقُ -تشنقُ- نفسها منذُ سنين

my sentence:
People aren't the the person that could be someone else