English verb conjugation
MUST SNIFFLE

Regular verb: sniffle - sniffled - sniffled

Affirmation

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

Negation

Simple form	V-ing form
I mustn't sniffle you mustn't sniffle he mustn't sniffle we mustn't sniffle you mustn't sniffle they mustn't sniffle	I mustn't be sniffling you mustn't be sniffling he mustn't be sniffling we mustn't be sniffling you mustn't be sniffling they mustn't be sniffling
Perfect	V-ing perfect
I mustn't have sniffled you mustn't have sniffled he mustn't have sniffled we mustn't have sniffled you mustn't have sniffled they mustn't have sniffled	I mustn't have been sniffling you mustn't have been sniffling he mustn't have been sniffling we mustn't have been sniffling you mustn't have been sniffling they mustn't have been sniffling

Interrogative form

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

Interro-negative form

Simple form	V-ing form
mustn't I sniffle? mustn't you sniffle? mustn't he sniffle? mustn't we sniffle? mustn't you sniffle? mustn't they sniffle?	mustn't I be sniffling? mustn't you be sniffling? mustn't he be sniffling? mustn't we be sniffling? mustn't you be sniffling? mustn't they be sniffling?
Perfect	V-ing perfect
mustn't I have sniffled? mustn't you have sniffled? mustn't he have sniffled? mustn't we have sniffled? mustn't you have sniffled? mustn't they have sniffled?	mustn't I have been sniffling? mustn't you have been sniffling? mustn't he have been sniffling? mustn't we have been sniffling? mustn't you have been sniffling? mustn't they have been sniffling?