English verb conjugation
SHOULD TRAIL

Regular verb: trail - trailed - trailed

Affirmation

Simple form	V-ing form
I should trail you should trail he should trail we should trail you should trail they should trail	I should be trailing you should be trailing he should be trailing we should be trailing you should be trailing they should be trailing
Perfect	V-ing perfect
I should have trailed you should have trailed he should have trailed we should have trailed you should have trailed they should have trailed	I should have been trailing you should have been trailing he should have been trailing we should have been trailing you should have been trailing they should have been trailing

Negation

Simple form	V-ing form
I should not trail you should not trail he should not trail we should not trail you should not trail they should not trail	I should not be trailing you should not be trailing he should not be trailing we should not be trailing you should not be trailing they should not be trailing
Perfect	V-ing perfect
I should not have trailed you should not have trailed he should not have trailed we should not have trailed you should not have trailed they should not have trailed	I should not have been trailing you should not have been trailing he should not have been trailing we should not have been trailing you should not have been trailing they should not have been trailing

Interrogative form

Simple form	V-ing form
should I trail? should you trail? should he trail? should we trail? should you trail? should they trail?	should I be trailing? should you be trailing? should he be trailing? should we be trailing? should you be trailing? should they be trailing?
Perfect	V-ing perfect
should I have trailed? should you have trailed? should he have trailed? should we have trailed? should you have trailed? should they have trailed?	should I have been trailing? should you have been trailing? should he have been trailing? should we have been trailing? should you have been trailing? should they have been trailing?

Interro-negative form

Simple form	V-ing form
should I not trail? should you not trail? should he not trail? should we not trail? should you not trail? should they not trail?	should I not be trailing? should you not be trailing? should he not be trailing? should we not be trailing? should you not be trailing? should they not be trailing?
Perfect	V-ing perfect
should I not have trailed? should you not have trailed? should he not have trailed? should we not have trailed? should you not have trailed? should they not have trailed?	should I not have been trailing? should you not have been trailing? should he not have been trailing? should we not have been trailing? should you not have been trailing? should they not have been trailing?