English verb conjugation
SHOULD SKETCH

Regular verb: sketch - sketched - sketched

Affirmation

Simple form	V-ing form
I'd sketch you'd sketch he'd sketch we'd sketch you'd sketch they'd sketch	I'd be sketching you'd be sketching he'd be sketching we'd be sketching you'd be sketching they'd be sketching
Perfect	V-ing perfect
I should've sketched you should've sketched he should've sketched we should've sketched you should've sketched they should've sketched	I should've been sketching you should've been sketching he should've been sketching we should've been sketching you should've been sketching they should've been sketching

Negation

Simple form	V-ing form
I shouldn't sketch you shouldn't sketch he shouldn't sketch we shouldn't sketch you shouldn't sketch they shouldn't sketch	I shouldn't be sketching you shouldn't be sketching he shouldn't be sketching we shouldn't be sketching you shouldn't be sketching they shouldn't be sketching
Perfect	V-ing perfect
I shouldn't have sketched you shouldn't have sketched he shouldn't have sketched we shouldn't have sketched you shouldn't have sketched they shouldn't have sketched	I shouldn't have been sketching you shouldn't have been sketching he shouldn't have been sketching we shouldn't have been sketching you shouldn't have been sketching they shouldn't have been sketching

Interrogative form

Simple form	V-ing form
should I sketch? should you sketch? should he sketch? should we sketch? should you sketch? should they sketch?	should I be sketching? should you be sketching? should he be sketching? should we be sketching? should you be sketching? should they be sketching?
Perfect	V-ing perfect
should I have sketched? should you have sketched? should he have sketched? should we have sketched? should you have sketched? should they have sketched?	should I have been sketching? should you have been sketching? should he have been sketching? should we have been sketching? should you have been sketching? should they have been sketching?

Interro-negative form

Simple form	V-ing form
shouldn't I sketch? shouldn't you sketch? shouldn't he sketch? shouldn't we sketch? shouldn't you sketch? shouldn't they sketch?	shouldn't I be sketching? shouldn't you be sketching? shouldn't he be sketching? shouldn't we be sketching? shouldn't you be sketching? shouldn't they be sketching?
Perfect	V-ing perfect
shouldn't I have sketched? shouldn't you have sketched? shouldn't he have sketched? shouldn't we have sketched? shouldn't you have sketched? shouldn't they have sketched?	shouldn't I have been sketching? shouldn't you have been sketching? shouldn't he have been sketching? shouldn't we have been sketching? shouldn't you have been sketching? shouldn't they have been sketching?