English verb conjugation
SHOULD GRAVEL

Regular verb: gravel - gravelled - gravelled

Affirmation

Simple form	V-ing form
I should gravel you should gravel she should gravel we should gravel you should gravel they should gravel	I should be gravelling you should be gravelling she should be gravelling we should be gravelling you should be gravelling they should be gravelling
Perfect	V-ing perfect
I should have gravelled you should have gravelled she should have gravelled we should have gravelled you should have gravelled they should have gravelled	I should have been gravelling you should have been gravelling she should have been gravelling we should have been gravelling you should have been gravelling they should have been gravelling

Negation

Simple form	V-ing form
I should not gravel you should not gravel she should not gravel we should not gravel you should not gravel they should not gravel	I should not be gravelling you should not be gravelling she should not be gravelling we should not be gravelling you should not be gravelling they should not be gravelling
Perfect	V-ing perfect
I should not have gravelled you should not have gravelled she should not have gravelled we should not have gravelled you should not have gravelled they should not have gravelled	I should not have been gravelling you should not have been gravelling she should not have been gravelling we should not have been gravelling you should not have been gravelling they should not have been gravelling

Interrogative form

Simple form	V-ing form
should I gravel? should you gravel? should she gravel? should we gravel? should you gravel? should they gravel?	should I be gravelling? should you be gravelling? should she be gravelling? should we be gravelling? should you be gravelling? should they be gravelling?
Perfect	V-ing perfect
should I have gravelled? should you have gravelled? should she have gravelled? should we have gravelled? should you have gravelled? should they have gravelled?	should I have been gravelling? should you have been gravelling? should she have been gravelling? should we have been gravelling? should you have been gravelling? should they have been gravelling?

Interro-negative form

Simple form	V-ing form
should I not gravel? should you not gravel? should she not gravel? should we not gravel? should you not gravel? should they not gravel?	should I not be gravelling? should you not be gravelling? should she not be gravelling? should we not be gravelling? should you not be gravelling? should they not be gravelling?
Perfect	V-ing perfect
should I not have gravelled? should you not have gravelled? should she not have gravelled? should we not have gravelled? should you not have gravelled? should they not have gravelled?	should I not have been gravelling? should you not have been gravelling? should she not have been gravelling? should we not have been gravelling? should you not have been gravelling? should they not have been gravelling?