English verb conjugation
SHOULD REQUIRE

Regular verb: require - required - required

Affirmation

Simple form	V-ing form
I should require you should require he should require we should require you should require they should require	I should be requiring you should be requiring he should be requiring we should be requiring you should be requiring they should be requiring
Perfect	V-ing perfect
I should have required you should have required he should have required we should have required you should have required they should have required	I should have been requiring you should have been requiring he should have been requiring we should have been requiring you should have been requiring they should have been requiring

Negation

Simple form	V-ing form
I should not require you should not require he should not require we should not require you should not require they should not require	I should not be requiring you should not be requiring he should not be requiring we should not be requiring you should not be requiring they should not be requiring
Perfect	V-ing perfect
I should not have required you should not have required he should not have required we should not have required you should not have required they should not have required	I should not have been requiring you should not have been requiring he should not have been requiring we should not have been requiring you should not have been requiring they should not have been requiring

Interrogative form

Simple form	V-ing form
should I require? should you require? should he require? should we require? should you require? should they require?	should I be requiring? should you be requiring? should he be requiring? should we be requiring? should you be requiring? should they be requiring?
Perfect	V-ing perfect
should I have required? should you have required? should he have required? should we have required? should you have required? should they have required?	should I have been requiring? should you have been requiring? should he have been requiring? should we have been requiring? should you have been requiring? should they have been requiring?

Interro-negative form

Simple form	V-ing form
should I not require? should you not require? should he not require? should we not require? should you not require? should they not require?	should I not be requiring? should you not be requiring? should he not be requiring? should we not be requiring? should you not be requiring? should they not be requiring?
Perfect	V-ing perfect
should I not have required? should you not have required? should he not have required? should we not have required? should you not have required? should they not have required?	should I not have been requiring? should you not have been requiring? should he not have been requiring? should we not have been requiring? should you not have been requiring? should they not have been requiring?