English verb conjugation
SHOULD UNDERLIE

Irregular verb: underlie - underlay - underlain

Affirmation

Simple form	V-ing form
I should underlie you should underlie she should underlie we should underlie you should underlie they should underlie	I should be underlying you should be underlying she should be underlying we should be underlying you should be underlying they should be underlying
Perfect	V-ing perfect
I should have underlain you should have underlain she should have underlain we should have underlain you should have underlain they should have underlain	I should have been underlying you should have been underlying she should have been underlying we should have been underlying you should have been underlying they should have been underlying

Negation

Simple form	V-ing form
I should not underlie you should not underlie she should not underlie we should not underlie you should not underlie they should not underlie	I should not be underlying you should not be underlying she should not be underlying we should not be underlying you should not be underlying they should not be underlying
Perfect	V-ing perfect
I should not have underlain you should not have underlain she should not have underlain we should not have underlain you should not have underlain they should not have underlain	I should not have been underlying you should not have been underlying she should not have been underlying we should not have been underlying you should not have been underlying they should not have been underlying

Interrogative form

Simple form	V-ing form
should I underlie? should you underlie? should she underlie? should we underlie? should you underlie? should they underlie?	should I be underlying? should you be underlying? should she be underlying? should we be underlying? should you be underlying? should they be underlying?
Perfect	V-ing perfect
should I have underlain? should you have underlain? should she have underlain? should we have underlain? should you have underlain? should they have underlain?	should I have been underlying? should you have been underlying? should she have been underlying? should we have been underlying? should you have been underlying? should they have been underlying?

Interro-negative form

Simple form	V-ing form
should I not underlie? should you not underlie? should she not underlie? should we not underlie? should you not underlie? should they not underlie?	should I not be underlying? should you not be underlying? should she not be underlying? should we not be underlying? should you not be underlying? should they not be underlying?
Perfect	V-ing perfect
should I not have underlain? should you not have underlain? should she not have underlain? should we not have underlain? should you not have underlain? should they not have underlain?	should I not have been underlying? should you not have been underlying? should she not have been underlying? should we not have been underlying? should you not have been underlying? should they not have been underlying?