Is it correct to say "quizás habran ido" for express supposition in the past, or the "quizás" is unnecessary?
I mean if i wanted to use presente perfecto it would have been "quizás han ido" but here im not sure what to do.
Another question is, what is the name of this words like "quizás, tal vez...." which express probability and where can i find the gramatic rules related ro them?
Thanks