English verb conjugation
SHOULD SNIFFLE

Regular verb: sniffle - sniffled - sniffled

Affirmation

Simple form	V-ing form
I should sniffle you should sniffle he should sniffle we should sniffle you should sniffle they should sniffle	I should be sniffling you should be sniffling he should be sniffling we should be sniffling you should be sniffling they should be sniffling
Perfect	V-ing perfect
I should have sniffled you should have sniffled he should have sniffled we should have sniffled you should have sniffled they should have sniffled	I should have been sniffling you should have been sniffling he should have been sniffling we should have been sniffling you should have been sniffling they should have been sniffling

Negation

Simple form	V-ing form
I should not sniffle you should not sniffle he should not sniffle we should not sniffle you should not sniffle they should not sniffle	I should not be sniffling you should not be sniffling he should not be sniffling we should not be sniffling you should not be sniffling they should not be sniffling
Perfect	V-ing perfect
I should not have sniffled you should not have sniffled he should not have sniffled we should not have sniffled you should not have sniffled they should not have sniffled	I should not have been sniffling you should not have been sniffling he should not have been sniffling we should not have been sniffling you should not have been sniffling they should not have been sniffling

Interrogative form

Simple form	V-ing form
should I sniffle? should you sniffle? should he sniffle? should we sniffle? should you sniffle? should they sniffle?	should I be sniffling? should you be sniffling? should he be sniffling? should we be sniffling? should you be sniffling? should they be sniffling?
Perfect	V-ing perfect
should I have sniffled? should you have sniffled? should he have sniffled? should we have sniffled? should you have sniffled? should they have sniffled?	should I have been sniffling? should you have been sniffling? should he have been sniffling? should we have been sniffling? should you have been sniffling? should they have been sniffling?

Interro-negative form

Simple form	V-ing form
should I not sniffle? should you not sniffle? should he not sniffle? should we not sniffle? should you not sniffle? should they not sniffle?	should I not be sniffling? should you not be sniffling? should he not be sniffling? should we not be sniffling? should you not be sniffling? should they not be sniffling?
Perfect	V-ing perfect
should I not have sniffled? should you not have sniffled? should he not have sniffled? should we not have sniffled? should you not have sniffled? should they not have sniffled?	should I not have been sniffling? should you not have been sniffling? should he not have been sniffling? should we not have been sniffling? should you not have been sniffling? should they not have been sniffling?