English verb conjugation
MUST TRIFFLE

Regular verb: triffle - triffled - triffled

Affirmation

Simple form	V-ing form
I must triffle you must triffle he must triffle we must triffle you must triffle they must triffle	I must be triffling you must be triffling he must be triffling we must be triffling you must be triffling they must be triffling
Perfect	V-ing perfect
I must have triffled you must have triffled he must have triffled we must have triffled you must have triffled they must have triffled	I must have been triffling you must have been triffling he must have been triffling we must have been triffling you must have been triffling they must have been triffling

Negation

Simple form	V-ing form
I must not triffle you must not triffle he must not triffle we must not triffle you must not triffle they must not triffle	I must not be triffling you must not be triffling he must not be triffling we must not be triffling you must not be triffling they must not be triffling
Perfect	V-ing perfect
I must not have triffled you must not have triffled he must not have triffled we must not have triffled you must not have triffled they must not have triffled	I must not have been triffling you must not have been triffling he must not have been triffling we must not have been triffling you must not have been triffling they must not have been triffling

Interrogative form

Simple form	V-ing form
must I triffle? must you triffle? must he triffle? must we triffle? must you triffle? must they triffle?	must I be triffling? must you be triffling? must he be triffling? must we be triffling? must you be triffling? must they be triffling?
Perfect	V-ing perfect
must I have triffled? must you have triffled? must he have triffled? must we have triffled? must you have triffled? must they have triffled?	must I have been triffling? must you have been triffling? must he have been triffling? must we have been triffling? must you have been triffling? must they have been triffling?

Interro-negative form

Simple form	V-ing form
must I not triffle? must you not triffle? must he not triffle? must we not triffle? must you not triffle? must they not triffle?	must I not be triffling? must you not be triffling? must he not be triffling? must we not be triffling? must you not be triffling? must they not be triffling?
Perfect	V-ing perfect
must I not have triffled? must you not have triffled? must he not have triffled? must we not have triffled? must you not have triffled? must they not have triffled?	must I not have been triffling? must you not have been triffling? must he not have been triffling? must we not have been triffling? must you not have been triffling? must they not have been triffling?