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 must not cow you must not cow he must not cow we must not cow you must not cow they must not cow	I must not be cowing you must not be cowing he must not be cowing we must not be cowing you must not be cowing they must not be cowing
Perfect	V-ing perfect
I must not have cowed you must not have cowed he must not have cowed we must not have cowed you must not have cowed they must not have cowed	I must not have been cowing you must not have been cowing he must not have been cowing we must not have been cowing you must not have been cowing they must not 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
must I not cow? must you not cow? must he not cow? must we not cow? must you not cow? must they not cow?	must I not be cowing? must you not be cowing? must he not be cowing? must we not be cowing? must you not be cowing? must they not be cowing?
Perfect	V-ing perfect
must I not have cowed? must you not have cowed? must he not have cowed? must we not have cowed? must you not have cowed? must they not have cowed?	must I not have been cowing? must you not have been cowing? must he not have been cowing? must we not have been cowing? must you not have been cowing? must they not have been cowing?