English verb conjugation
SHOULD DULL

Regular verb: dull - dulled - dulled

Affirmation

Simple form	V-ing form
I'd dull you'd dull he'd dull we'd dull you'd dull they'd dull	I'd be dulling you'd be dulling he'd be dulling we'd be dulling you'd be dulling they'd be dulling
Perfect	V-ing perfect
I should've dulled you should've dulled he should've dulled we should've dulled you should've dulled they should've dulled	I should've been dulling you should've been dulling he should've been dulling we should've been dulling you should've been dulling they should've been dulling

Negation

Simple form	V-ing form
I shouldn't dull you shouldn't dull he shouldn't dull we shouldn't dull you shouldn't dull they shouldn't dull	I shouldn't be dulling you shouldn't be dulling he shouldn't be dulling we shouldn't be dulling you shouldn't be dulling they shouldn't be dulling
Perfect	V-ing perfect
I shouldn't have dulled you shouldn't have dulled he shouldn't have dulled we shouldn't have dulled you shouldn't have dulled they shouldn't have dulled	I shouldn't have been dulling you shouldn't have been dulling he shouldn't have been dulling we shouldn't have been dulling you shouldn't have been dulling they shouldn't have been dulling

Interrogative form

Simple form	V-ing form
should I dull? should you dull? should he dull? should we dull? should you dull? should they dull?	should I be dulling? should you be dulling? should he be dulling? should we be dulling? should you be dulling? should they be dulling?
Perfect	V-ing perfect
should I have dulled? should you have dulled? should he have dulled? should we have dulled? should you have dulled? should they have dulled?	should I have been dulling? should you have been dulling? should he have been dulling? should we have been dulling? should you have been dulling? should they have been dulling?

Interro-negative form

Simple form	V-ing form
shouldn't I dull? shouldn't you dull? shouldn't he dull? shouldn't we dull? shouldn't you dull? shouldn't they dull?	shouldn't I be dulling? shouldn't you be dulling? shouldn't he be dulling? shouldn't we be dulling? shouldn't you be dulling? shouldn't they be dulling?
Perfect	V-ing perfect
shouldn't I have dulled? shouldn't you have dulled? shouldn't he have dulled? shouldn't we have dulled? shouldn't you have dulled? shouldn't they have dulled?	shouldn't I have been dulling? shouldn't you have been dulling? shouldn't he have been dulling? shouldn't we have been dulling? shouldn't you have been dulling? shouldn't they have been dulling?