I should have …..-ed (used only in the 1st person and not necessary to say би)
….-даг байж
I should have done my homework
Гэрийн даалгавраа хийдэг байж
W should have helped my friend
Найздаа тусалдаг байж
I should have gone with them
Тэдэнтэй явдаг байж
I shouldn’t have driven the car
Машин барьдаггүй байж
I shouldn’t have done that (what you said)
Тэгдэг байж
you/he/she should have…..-ed
(Чи, тэр)verb stem +хгүй
You should have done your homework
Чи гэрийн даалнавраа хийхгүй (яасан юм бэ?)
He/she should have done his/her homework
Тэр гэрийн даалгавраа хийхгүй
You should not have been angry
Чи уурлахгүй байхгүй (яасан юм бэ?)
You/he should have done that (what you said)
Тэгэхгүй