English verb conjugation
SHOULD DULL

Regular verb: dull - dulled - dulled

Affirmation

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

Negation

Simple form	V-ing form
I should not dull you should not dull he should not dull we should not dull you should not dull they should not dull	I should not be dulling you should not be dulling he should not be dulling we should not be dulling you should not be dulling they should not be dulling
Perfect	V-ing perfect
I should not have dulled you should not have dulled he should not have dulled we should not have dulled you should not have dulled they should not have dulled	I should not have been dulling you should not have been dulling he should not have been dulling we should not have been dulling you should not have been dulling they should not 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
should I not dull? should you not dull? should he not dull? should we not dull? should you not dull? should they not dull?	should I not be dulling? should you not be dulling? should he not be dulling? should we not be dulling? should you not be dulling? should they not be dulling?
Perfect	V-ing perfect
should I not have dulled? should you not have dulled? should he not have dulled? should we not have dulled? should you not have dulled? should they not have dulled?	should I not have been dulling? should you not have been dulling? should he not have been dulling? should we not have been dulling? should you not have been dulling? should they not have been dulling?