English verb conjugation
MUST PURFLE

Regular verb: purfle - purfled - purfled

Affirmation

Simple form	V-ing form
I must purfle you must purfle he must purfle we must purfle you must purfle they must purfle	I must be purfling you must be purfling he must be purfling we must be purfling you must be purfling they must be purfling
Perfect	V-ing perfect
I must have purfled you must have purfled he must have purfled we must have purfled you must have purfled they must have purfled	I must have been purfling you must have been purfling he must have been purfling we must have been purfling you must have been purfling they must have been purfling

Negation

Simple form	V-ing form
I must not purfle you must not purfle he must not purfle we must not purfle you must not purfle they must not purfle	I must not be purfling you must not be purfling he must not be purfling we must not be purfling you must not be purfling they must not be purfling
Perfect	V-ing perfect
I must not have purfled you must not have purfled he must not have purfled we must not have purfled you must not have purfled they must not have purfled	I must not have been purfling you must not have been purfling he must not have been purfling we must not have been purfling you must not have been purfling they must not have been purfling

Interrogative form

Simple form	V-ing form
must I purfle? must you purfle? must he purfle? must we purfle? must you purfle? must they purfle?	must I be purfling? must you be purfling? must he be purfling? must we be purfling? must you be purfling? must they be purfling?
Perfect	V-ing perfect
must I have purfled? must you have purfled? must he have purfled? must we have purfled? must you have purfled? must they have purfled?	must I have been purfling? must you have been purfling? must he have been purfling? must we have been purfling? must you have been purfling? must they have been purfling?

Interro-negative form

Simple form	V-ing form
must I not purfle? must you not purfle? must he not purfle? must we not purfle? must you not purfle? must they not purfle?	must I not be purfling? must you not be purfling? must he not be purfling? must we not be purfling? must you not be purfling? must they not be purfling?
Perfect	V-ing perfect
must I not have purfled? must you not have purfled? must he not have purfled? must we not have purfled? must you not have purfled? must they not have purfled?	must I not have been purfling? must you not have been purfling? must he not have been purfling? must we not have been purfling? must you not have been purfling? must they not have been purfling?