English verb conjugation
SHOULD QUARTERBACK

Regular verb: quarterback - quarterbacked - quarterbacked

Affirmation

Simple form	V-ing form
I should quarterback you should quarterback he should quarterback we should quarterback you should quarterback they should quarterback	I should be quarterbacking you should be quarterbacking he should be quarterbacking we should be quarterbacking you should be quarterbacking they should be quarterbacking
Perfect	V-ing perfect
I should have quarterbacked you should have quarterbacked he should have quarterbacked we should have quarterbacked you should have quarterbacked they should have quarterbacked	I should have been quarterbacking you should have been quarterbacking he should have been quarterbacking we should have been quarterbacking you should have been quarterbacking they should have been quarterbacking

Negation

Simple form	V-ing form
I should not quarterback you should not quarterback he should not quarterback we should not quarterback you should not quarterback they should not quarterback	I should not be quarterbacking you should not be quarterbacking he should not be quarterbacking we should not be quarterbacking you should not be quarterbacking they should not be quarterbacking
Perfect	V-ing perfect
I should not have quarterbacked you should not have quarterbacked he should not have quarterbacked we should not have quarterbacked you should not have quarterbacked they should not have quarterbacked	I should not have been quarterbacking you should not have been quarterbacking he should not have been quarterbacking we should not have been quarterbacking you should not have been quarterbacking they should not have been quarterbacking

Interrogative form

Simple form	V-ing form
should I quarterback? should you quarterback? should he quarterback? should we quarterback? should you quarterback? should they quarterback?	should I be quarterbacking? should you be quarterbacking? should he be quarterbacking? should we be quarterbacking? should you be quarterbacking? should they be quarterbacking?
Perfect	V-ing perfect
should I have quarterbacked? should you have quarterbacked? should he have quarterbacked? should we have quarterbacked? should you have quarterbacked? should they have quarterbacked?	should I have been quarterbacking? should you have been quarterbacking? should he have been quarterbacking? should we have been quarterbacking? should you have been quarterbacking? should they have been quarterbacking?

Interro-negative form

Simple form	V-ing form
should I not quarterback? should you not quarterback? should he not quarterback? should we not quarterback? should you not quarterback? should they not quarterback?	should I not be quarterbacking? should you not be quarterbacking? should he not be quarterbacking? should we not be quarterbacking? should you not be quarterbacking? should they not be quarterbacking?
Perfect	V-ing perfect
should I not have quarterbacked? should you not have quarterbacked? should he not have quarterbacked? should we not have quarterbacked? should you not have quarterbacked? should they not have quarterbacked?	should I not have been quarterbacking? should you not have been quarterbacking? should he not have been quarterbacking? should we not have been quarterbacking? should you not have been quarterbacking? should they not have been quarterbacking?