English verb conjugation
SHOULD DECREASE

Regular verb: decrease - decreased - decreased

Affirmation

Simple form	V-ing form
I should decrease you should decrease he should decrease we should decrease you should decrease they should decrease	I should be decreasing you should be decreasing he should be decreasing we should be decreasing you should be decreasing they should be decreasing
Perfect	V-ing perfect
I should have decreased you should have decreased he should have decreased we should have decreased you should have decreased they should have decreased	I should have been decreasing you should have been decreasing he should have been decreasing we should have been decreasing you should have been decreasing they should have been decreasing

Negation

Simple form	V-ing form
I should not decrease you should not decrease he should not decrease we should not decrease you should not decrease they should not decrease	I should not be decreasing you should not be decreasing he should not be decreasing we should not be decreasing you should not be decreasing they should not be decreasing
Perfect	V-ing perfect
I should not have decreased you should not have decreased he should not have decreased we should not have decreased you should not have decreased they should not have decreased	I should not have been decreasing you should not have been decreasing he should not have been decreasing we should not have been decreasing you should not have been decreasing they should not have been decreasing

Interrogative form

Simple form	V-ing form
should I decrease? should you decrease? should he decrease? should we decrease? should you decrease? should they decrease?	should I be decreasing? should you be decreasing? should he be decreasing? should we be decreasing? should you be decreasing? should they be decreasing?
Perfect	V-ing perfect
should I have decreased? should you have decreased? should he have decreased? should we have decreased? should you have decreased? should they have decreased?	should I have been decreasing? should you have been decreasing? should he have been decreasing? should we have been decreasing? should you have been decreasing? should they have been decreasing?

Interro-negative form

Simple form	V-ing form
should I not decrease? should you not decrease? should he not decrease? should we not decrease? should you not decrease? should they not decrease?	should I not be decreasing? should you not be decreasing? should he not be decreasing? should we not be decreasing? should you not be decreasing? should they not be decreasing?
Perfect	V-ing perfect
should I not have decreased? should you not have decreased? should he not have decreased? should we not have decreased? should you not have decreased? should they not have decreased?	should I not have been decreasing? should you not have been decreasing? should he not have been decreasing? should we not have been decreasing? should you not have been decreasing? should they not have been decreasing?