English verb conjugation
SHOULD LETTER

Regular verb: letter - lettered - lettered

Affirmation

Simple form	V-ing form
I should letter you should letter he should letter we should letter you should letter they should letter	I should be lettering you should be lettering he should be lettering we should be lettering you should be lettering they should be lettering
Perfect	V-ing perfect
I should have lettered you should have lettered he should have lettered we should have lettered you should have lettered they should have lettered	I should have been lettering you should have been lettering he should have been lettering we should have been lettering you should have been lettering they should have been lettering

Negation

Simple form	V-ing form
I should not letter you should not letter he should not letter we should not letter you should not letter they should not letter	I should not be lettering you should not be lettering he should not be lettering we should not be lettering you should not be lettering they should not be lettering
Perfect	V-ing perfect
I should not have lettered you should not have lettered he should not have lettered we should not have lettered you should not have lettered they should not have lettered	I should not have been lettering you should not have been lettering he should not have been lettering we should not have been lettering you should not have been lettering they should not have been lettering

Interrogative form

Simple form	V-ing form
should I letter? should you letter? should he letter? should we letter? should you letter? should they letter?	should I be lettering? should you be lettering? should he be lettering? should we be lettering? should you be lettering? should they be lettering?
Perfect	V-ing perfect
should I have lettered? should you have lettered? should he have lettered? should we have lettered? should you have lettered? should they have lettered?	should I have been lettering? should you have been lettering? should he have been lettering? should we have been lettering? should you have been lettering? should they have been lettering?

Interro-negative form

Simple form	V-ing form
should I not letter? should you not letter? should he not letter? should we not letter? should you not letter? should they not letter?	should I not be lettering? should you not be lettering? should he not be lettering? should we not be lettering? should you not be lettering? should they not be lettering?
Perfect	V-ing perfect
should I not have lettered? should you not have lettered? should he not have lettered? should we not have lettered? should you not have lettered? should they not have lettered?	should I not have been lettering? should you not have been lettering? should he not have been lettering? should we not have been lettering? should you not have been lettering? should they not have been lettering?