English verb conjugation
SHOULD USE

Regular verb: use - used - used

Affirmation

Simple form	V-ing form
I should use you should use he should use we should use you should use they should use	I should be using you should be using he should be using we should be using you should be using they should be using
Perfect	V-ing perfect
I should have used you should have used he should have used we should have used you should have used they should have used	I should have been using you should have been using he should have been using we should have been using you should have been using they should have been using

Negation

Simple form	V-ing form
I should not use you should not use he should not use we should not use you should not use they should not use	I should not be using you should not be using he should not be using we should not be using you should not be using they should not be using
Perfect	V-ing perfect
I should not have used you should not have used he should not have used we should not have used you should not have used they should not have used	I should not have been using you should not have been using he should not have been using we should not have been using you should not have been using they should not have been using

Interrogative form

Simple form	V-ing form
should I use? should you use? should he use? should we use? should you use? should they use?	should I be using? should you be using? should he be using? should we be using? should you be using? should they be using?
Perfect	V-ing perfect
should I have used? should you have used? should he have used? should we have used? should you have used? should they have used?	should I have been using? should you have been using? should he have been using? should we have been using? should you have been using? should they have been using?

Interro-negative form

Simple form	V-ing form
should I not use? should you not use? should he not use? should we not use? should you not use? should they not use?	should I not be using? should you not be using? should he not be using? should we not be using? should you not be using? should they not be using?
Perfect	V-ing perfect
should I not have used? should you not have used? should he not have used? should we not have used? should you not have used? should they not have used?	should I not have been using? should you not have been using? should he not have been using? should we not have been using? should you not have been using? should they not have been using?