I'd be excelling you'd be excelling he'd be excelling we'd be excelling you'd be excelling they'd be excelling
Perfect
I should've excelled you should've excelled he should've excelled we should've excelled you should've excelled they should've excelled
V-ing perfect
I should've been excelling you should've been excelling he should've been excelling we should've been excelling you should've been excelling they should've been excelling
Negation
Simple form
I shouldn't excel you shouldn't excel he shouldn't excel we shouldn't excel you shouldn't excel they shouldn't excel
V-ing form
I shouldn't be excelling you shouldn't be excelling he shouldn't be excelling we shouldn't be excelling you shouldn't be excelling they shouldn't be excelling
Perfect
I shouldn't have excelled you shouldn't have excelled he shouldn't have excelled we shouldn't have excelled you shouldn't have excelled they shouldn't have excelled
V-ing perfect
I shouldn't have been excelling you shouldn't have been excelling he shouldn't have been excelling we shouldn't have been excelling you shouldn't have been excelling they shouldn't have been excelling
Interrogative form
Simple form
should I excel? should you excel? should he excel? should we excel? should you excel? should they excel?
V-ing form
should I be excelling? should you be excelling? should he be excelling? should we be excelling? should you be excelling? should they be excelling?
Perfect
should I have excelled? should you have excelled? should he have excelled? should we have excelled? should you have excelled? should they have excelled?
V-ing perfect
should I have been excelling? should you have been excelling? should he have been excelling? should we have been excelling? should you have been excelling? should they have been excelling?
Interro-negative form
Simple form
shouldn't I excel? shouldn't you excel? shouldn't he excel? shouldn't we excel? shouldn't you excel? shouldn't they excel?
V-ing form
shouldn't I be excelling? shouldn't you be excelling? shouldn't he be excelling? shouldn't we be excelling? shouldn't you be excelling? shouldn't they be excelling?
Perfect
shouldn't I have excelled? shouldn't you have excelled? shouldn't he have excelled? shouldn't we have excelled? shouldn't you have excelled? shouldn't they have excelled?
V-ing perfect
shouldn't I have been excelling? shouldn't you have been excelling? shouldn't he have been excelling? shouldn't we have been excelling? shouldn't you have been excelling? shouldn't they have been excelling?