English verb conjugation
MUST PLOW

Regular verb: plow - plowed - plowed

Affirmation

Simple form	V-ing form
I must plow you must plow she must plow we must plow you must plow they must plow	I must be plowing you must be plowing she must be plowing we must be plowing you must be plowing they must be plowing
Perfect	V-ing perfect
I must have plowed you must have plowed she must have plowed we must have plowed you must have plowed they must have plowed	I must have been plowing you must have been plowing she must have been plowing we must have been plowing you must have been plowing they must have been plowing

Negation

Simple form	V-ing form
I must not plow you must not plow she must not plow we must not plow you must not plow they must not plow	I must not be plowing you must not be plowing she must not be plowing we must not be plowing you must not be plowing they must not be plowing
Perfect	V-ing perfect
I must not have plowed you must not have plowed she must not have plowed we must not have plowed you must not have plowed they must not have plowed	I must not have been plowing you must not have been plowing she must not have been plowing we must not have been plowing you must not have been plowing they must not have been plowing

Interrogative form

Simple form	V-ing form
must I plow? must you plow? must she plow? must we plow? must you plow? must they plow?	must I be plowing? must you be plowing? must she be plowing? must we be plowing? must you be plowing? must they be plowing?
Perfect	V-ing perfect
must I have plowed? must you have plowed? must she have plowed? must we have plowed? must you have plowed? must they have plowed?	must I have been plowing? must you have been plowing? must she have been plowing? must we have been plowing? must you have been plowing? must they have been plowing?

Interro-negative form

Simple form	V-ing form
must I not plow? must you not plow? must she not plow? must we not plow? must you not plow? must they not plow?	must I not be plowing? must you not be plowing? must she not be plowing? must we not be plowing? must you not be plowing? must they not be plowing?
Perfect	V-ing perfect
must I not have plowed? must you not have plowed? must she not have plowed? must we not have plowed? must you not have plowed? must they not have plowed?	must I not have been plowing? must you not have been plowing? must she not have been plowing? must we not have been plowing? must you not have been plowing? must they not have been plowing?