English verb conjugation
SHOULD SKETCH

Regular verb: sketch - sketched - sketched

Affirmation

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

Negation

Simple form	V-ing form
I should not sketch you should not sketch he should not sketch we should not sketch you should not sketch they should not sketch	I should not be sketching you should not be sketching he should not be sketching we should not be sketching you should not be sketching they should not be sketching
Perfect	V-ing perfect
I should not have sketched you should not have sketched he should not have sketched we should not have sketched you should not have sketched they should not have sketched	I should not have been sketching you should not have been sketching he should not have been sketching we should not have been sketching you should not have been sketching they should not 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
should I not sketch? should you not sketch? should he not sketch? should we not sketch? should you not sketch? should they not sketch?	should I not be sketching? should you not be sketching? should he not be sketching? should we not be sketching? should you not be sketching? should they not be sketching?
Perfect	V-ing perfect
should I not have sketched? should you not have sketched? should he not have sketched? should we not have sketched? should you not have sketched? should they not have sketched?	should I not have been sketching? should you not have been sketching? should he not have been sketching? should we not have been sketching? should you not have been sketching? should they not have been sketching?