English verb conjugation
MUST TWIRL

Regular verb: twirl - twirled - twirled

Affirmation

Simple form	V-ing form
I must twirl you must twirl he must twirl we must twirl you must twirl they must twirl	I must be twirling you must be twirling he must be twirling we must be twirling you must be twirling they must be twirling
Perfect	V-ing perfect
I must have twirled you must have twirled he must have twirled we must have twirled you must have twirled they must have twirled	I must have been twirling you must have been twirling he must have been twirling we must have been twirling you must have been twirling they must have been twirling

Negation

Simple form	V-ing form
I must not twirl you must not twirl he must not twirl we must not twirl you must not twirl they must not twirl	I must not be twirling you must not be twirling he must not be twirling we must not be twirling you must not be twirling they must not be twirling
Perfect	V-ing perfect
I must not have twirled you must not have twirled he must not have twirled we must not have twirled you must not have twirled they must not have twirled	I must not have been twirling you must not have been twirling he must not have been twirling we must not have been twirling you must not have been twirling they must not have been twirling

Interrogative form

Simple form	V-ing form
must I twirl? must you twirl? must he twirl? must we twirl? must you twirl? must they twirl?	must I be twirling? must you be twirling? must he be twirling? must we be twirling? must you be twirling? must they be twirling?
Perfect	V-ing perfect
must I have twirled? must you have twirled? must he have twirled? must we have twirled? must you have twirled? must they have twirled?	must I have been twirling? must you have been twirling? must he have been twirling? must we have been twirling? must you have been twirling? must they have been twirling?

Interro-negative form

Simple form	V-ing form
must I not twirl? must you not twirl? must he not twirl? must we not twirl? must you not twirl? must they not twirl?	must I not be twirling? must you not be twirling? must he not be twirling? must we not be twirling? must you not be twirling? must they not be twirling?
Perfect	V-ing perfect
must I not have twirled? must you not have twirled? must he not have twirled? must we not have twirled? must you not have twirled? must they not have twirled?	must I not have been twirling? must you not have been twirling? must he not have been twirling? must we not have been twirling? must you not have been twirling? must they not have been twirling?