English verb conjugation
MUST COW

Regular verb: cow - cowed - cowed

Affirmation

Simple form	V-ing form
I must cow you must cow he must cow we must cow you must cow they must cow	I must be cowing you must be cowing he must be cowing we must be cowing you must be cowing they must be cowing
Perfect	V-ing perfect
I must have cowed you must have cowed he must have cowed we must have cowed you must have cowed they must have cowed	I must have been cowing you must have been cowing he must have been cowing we must have been cowing you must have been cowing they must have been cowing

Negation

Simple form	V-ing form
I mustn't cow you mustn't cow he mustn't cow we mustn't cow you mustn't cow they mustn't cow	I mustn't be cowing you mustn't be cowing he mustn't be cowing we mustn't be cowing you mustn't be cowing they mustn't be cowing
Perfect	V-ing perfect
I mustn't have cowed you mustn't have cowed he mustn't have cowed we mustn't have cowed you mustn't have cowed they mustn't have cowed	I mustn't have been cowing you mustn't have been cowing he mustn't have been cowing we mustn't have been cowing you mustn't have been cowing they mustn't have been cowing

Interrogative form

Simple form	V-ing form
must I cow? must you cow? must he cow? must we cow? must you cow? must they cow?	must I be cowing? must you be cowing? must he be cowing? must we be cowing? must you be cowing? must they be cowing?
Perfect	V-ing perfect
must I have cowed? must you have cowed? must he have cowed? must we have cowed? must you have cowed? must they have cowed?	must I have been cowing? must you have been cowing? must he have been cowing? must we have been cowing? must you have been cowing? must they have been cowing?

Interro-negative form

Simple form	V-ing form
mustn't I cow? mustn't you cow? mustn't he cow? mustn't we cow? mustn't you cow? mustn't they cow?	mustn't I be cowing? mustn't you be cowing? mustn't he be cowing? mustn't we be cowing? mustn't you be cowing? mustn't they be cowing?
Perfect	V-ing perfect
mustn't I have cowed? mustn't you have cowed? mustn't he have cowed? mustn't we have cowed? mustn't you have cowed? mustn't they have cowed?	mustn't I have been cowing? mustn't you have been cowing? mustn't he have been cowing? mustn't we have been cowing? mustn't you have been cowing? mustn't they have been cowing?