English verb conjugation
MUST COWL

Regular verb: cowl - cowled - cowled

Affirmation

Simple form	V-ing form
I must cowl you must cowl he must cowl we must cowl you must cowl they must cowl	I must be cowling you must be cowling he must be cowling we must be cowling you must be cowling they must be cowling
Perfect	V-ing perfect
I must have cowled you must have cowled he must have cowled we must have cowled you must have cowled they must have cowled	I must have been cowling you must have been cowling he must have been cowling we must have been cowling you must have been cowling they must have been cowling

Negation

Simple form	V-ing form
I mustn't cowl you mustn't cowl he mustn't cowl we mustn't cowl you mustn't cowl they mustn't cowl	I mustn't be cowling you mustn't be cowling he mustn't be cowling we mustn't be cowling you mustn't be cowling they mustn't be cowling
Perfect	V-ing perfect
I mustn't have cowled you mustn't have cowled he mustn't have cowled we mustn't have cowled you mustn't have cowled they mustn't have cowled	I mustn't have been cowling you mustn't have been cowling he mustn't have been cowling we mustn't have been cowling you mustn't have been cowling they mustn't have been cowling

Interrogative form

Simple form	V-ing form
must I cowl? must you cowl? must he cowl? must we cowl? must you cowl? must they cowl?	must I be cowling? must you be cowling? must he be cowling? must we be cowling? must you be cowling? must they be cowling?
Perfect	V-ing perfect
must I have cowled? must you have cowled? must he have cowled? must we have cowled? must you have cowled? must they have cowled?	must I have been cowling? must you have been cowling? must he have been cowling? must we have been cowling? must you have been cowling? must they have been cowling?

Interro-negative form

Simple form	V-ing form
mustn't I cowl? mustn't you cowl? mustn't he cowl? mustn't we cowl? mustn't you cowl? mustn't they cowl?	mustn't I be cowling? mustn't you be cowling? mustn't he be cowling? mustn't we be cowling? mustn't you be cowling? mustn't they be cowling?
Perfect	V-ing perfect
mustn't I have cowled? mustn't you have cowled? mustn't he have cowled? mustn't we have cowled? mustn't you have cowled? mustn't they have cowled?	mustn't I have been cowling? mustn't you have been cowling? mustn't he have been cowling? mustn't we have been cowling? mustn't you have been cowling? mustn't they have been cowling?