English verb conjugation
MUST PLOUGH

Regular verb: plough - ploughed - ploughed

Affirmation

Simple form	V-ing form
I must plough you must plough he must plough we must plough you must plough they must plough	I must be ploughing you must be ploughing he must be ploughing we must be ploughing you must be ploughing they must be ploughing
Perfect	V-ing perfect
I must have ploughed you must have ploughed he must have ploughed we must have ploughed you must have ploughed they must have ploughed	I must have been ploughing you must have been ploughing he must have been ploughing we must have been ploughing you must have been ploughing they must have been ploughing

Negation

Simple form	V-ing form
I must not plough you must not plough he must not plough we must not plough you must not plough they must not plough	I must not be ploughing you must not be ploughing he must not be ploughing we must not be ploughing you must not be ploughing they must not be ploughing
Perfect	V-ing perfect
I must not have ploughed you must not have ploughed he must not have ploughed we must not have ploughed you must not have ploughed they must not have ploughed	I must not have been ploughing you must not have been ploughing he must not have been ploughing we must not have been ploughing you must not have been ploughing they must not have been ploughing

Interrogative form

Simple form	V-ing form
must I plough? must you plough? must he plough? must we plough? must you plough? must they plough?	must I be ploughing? must you be ploughing? must he be ploughing? must we be ploughing? must you be ploughing? must they be ploughing?
Perfect	V-ing perfect
must I have ploughed? must you have ploughed? must he have ploughed? must we have ploughed? must you have ploughed? must they have ploughed?	must I have been ploughing? must you have been ploughing? must he have been ploughing? must we have been ploughing? must you have been ploughing? must they have been ploughing?

Interro-negative form

Simple form	V-ing form
must I not plough? must you not plough? must he not plough? must we not plough? must you not plough? must they not plough?	must I not be ploughing? must you not be ploughing? must he not be ploughing? must we not be ploughing? must you not be ploughing? must they not be ploughing?
Perfect	V-ing perfect
must I not have ploughed? must you not have ploughed? must he not have ploughed? must we not have ploughed? must you not have ploughed? must they not have ploughed?	must I not have been ploughing? must you not have been ploughing? must he not have been ploughing? must we not have been ploughing? must you not have been ploughing? must they not have been ploughing?