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