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 mustn't twirl you mustn't twirl he mustn't twirl we mustn't twirl you mustn't twirl they mustn't twirl	I mustn't be twirling you mustn't be twirling he mustn't be twirling we mustn't be twirling you mustn't be twirling they mustn't be twirling
Perfect	V-ing perfect
I mustn't have twirled you mustn't have twirled he mustn't have twirled we mustn't have twirled you mustn't have twirled they mustn't have twirled	I mustn't have been twirling you mustn't have been twirling he mustn't have been twirling we mustn't have been twirling you mustn't have been twirling they mustn't 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
mustn't I twirl? mustn't you twirl? mustn't he twirl? mustn't we twirl? mustn't you twirl? mustn't they twirl?	mustn't I be twirling? mustn't you be twirling? mustn't he be twirling? mustn't we be twirling? mustn't you be twirling? mustn't they be twirling?
Perfect	V-ing perfect
mustn't I have twirled? mustn't you have twirled? mustn't he have twirled? mustn't we have twirled? mustn't you have twirled? mustn't they have twirled?	mustn't I have been twirling? mustn't you have been twirling? mustn't he have been twirling? mustn't we have been twirling? mustn't you have been twirling? mustn't they have been twirling?