English verb conjugation
MUST CURL

Regular verb: curl - curled - curled

Affirmation

Simple form	V-ing form
I must curl you must curl he must curl we must curl you must curl they must curl	I must be curling you must be curling he must be curling we must be curling you must be curling they must be curling
Perfect	V-ing perfect
I must have curled you must have curled he must have curled we must have curled you must have curled they must have curled	I must have been curling you must have been curling he must have been curling we must have been curling you must have been curling they must have been curling

Negation

Simple form	V-ing form
I mustn't curl you mustn't curl he mustn't curl we mustn't curl you mustn't curl they mustn't curl	I mustn't be curling you mustn't be curling he mustn't be curling we mustn't be curling you mustn't be curling they mustn't be curling
Perfect	V-ing perfect
I mustn't have curled you mustn't have curled he mustn't have curled we mustn't have curled you mustn't have curled they mustn't have curled	I mustn't have been curling you mustn't have been curling he mustn't have been curling we mustn't have been curling you mustn't have been curling they mustn't have been curling

Interrogative form

Simple form	V-ing form
must I curl? must you curl? must he curl? must we curl? must you curl? must they curl?	must I be curling? must you be curling? must he be curling? must we be curling? must you be curling? must they be curling?
Perfect	V-ing perfect
must I have curled? must you have curled? must he have curled? must we have curled? must you have curled? must they have curled?	must I have been curling? must you have been curling? must he have been curling? must we have been curling? must you have been curling? must they have been curling?

Interro-negative form

Simple form	V-ing form
mustn't I curl? mustn't you curl? mustn't he curl? mustn't we curl? mustn't you curl? mustn't they curl?	mustn't I be curling? mustn't you be curling? mustn't he be curling? mustn't we be curling? mustn't you be curling? mustn't they be curling?
Perfect	V-ing perfect
mustn't I have curled? mustn't you have curled? mustn't he have curled? mustn't we have curled? mustn't you have curled? mustn't they have curled?	mustn't I have been curling? mustn't you have been curling? mustn't he have been curling? mustn't we have been curling? mustn't you have been curling? mustn't they have been curling?