English verb conjugation
SHOULD RIFFLE

Regular verb: riffle - riffled - riffled

Affirmation

Simple form	V-ing form
I should riffle you should riffle he should riffle we should riffle you should riffle they should riffle	I should be riffling you should be riffling he should be riffling we should be riffling you should be riffling they should be riffling
Perfect	V-ing perfect
I should have riffled you should have riffled he should have riffled we should have riffled you should have riffled they should have riffled	I should have been riffling you should have been riffling he should have been riffling we should have been riffling you should have been riffling they should have been riffling

Negation

Simple form	V-ing form
I should not riffle you should not riffle he should not riffle we should not riffle you should not riffle they should not riffle	I should not be riffling you should not be riffling he should not be riffling we should not be riffling you should not be riffling they should not be riffling
Perfect	V-ing perfect
I should not have riffled you should not have riffled he should not have riffled we should not have riffled you should not have riffled they should not have riffled	I should not have been riffling you should not have been riffling he should not have been riffling we should not have been riffling you should not have been riffling they should not have been riffling

Interrogative form

Simple form	V-ing form
should I riffle? should you riffle? should he riffle? should we riffle? should you riffle? should they riffle?	should I be riffling? should you be riffling? should he be riffling? should we be riffling? should you be riffling? should they be riffling?
Perfect	V-ing perfect
should I have riffled? should you have riffled? should he have riffled? should we have riffled? should you have riffled? should they have riffled?	should I have been riffling? should you have been riffling? should he have been riffling? should we have been riffling? should you have been riffling? should they have been riffling?

Interro-negative form

Simple form	V-ing form
should I not riffle? should you not riffle? should he not riffle? should we not riffle? should you not riffle? should they not riffle?	should I not be riffling? should you not be riffling? should he not be riffling? should we not be riffling? should you not be riffling? should they not be riffling?
Perfect	V-ing perfect
should I not have riffled? should you not have riffled? should he not have riffled? should we not have riffled? should you not have riffled? should they not have riffled?	should I not have been riffling? should you not have been riffling? should he not have been riffling? should we not have been riffling? should you not have been riffling? should they not have been riffling?