English verb conjugation
MUST MAT

Regular verb: mat - matted - matted

Affirmation

Simple form	V-ing form
I must mat you must mat he must mat we must mat you must mat they must mat	I must be matting you must be matting he must be matting we must be matting you must be matting they must be matting
Perfect	V-ing perfect
I must have matted you must have matted he must have matted we must have matted you must have matted they must have matted	I must have been matting you must have been matting he must have been matting we must have been matting you must have been matting they must have been matting

Negation

Simple form	V-ing form
I must not mat you must not mat he must not mat we must not mat you must not mat they must not mat	I must not be matting you must not be matting he must not be matting we must not be matting you must not be matting they must not be matting
Perfect	V-ing perfect
I must not have matted you must not have matted he must not have matted we must not have matted you must not have matted they must not have matted	I must not have been matting you must not have been matting he must not have been matting we must not have been matting you must not have been matting they must not have been matting

Interrogative form

Simple form	V-ing form
must I mat? must you mat? must he mat? must we mat? must you mat? must they mat?	must I be matting? must you be matting? must he be matting? must we be matting? must you be matting? must they be matting?
Perfect	V-ing perfect
must I have matted? must you have matted? must he have matted? must we have matted? must you have matted? must they have matted?	must I have been matting? must you have been matting? must he have been matting? must we have been matting? must you have been matting? must they have been matting?

Interro-negative form

Simple form	V-ing form
must I not mat? must you not mat? must he not mat? must we not mat? must you not mat? must they not mat?	must I not be matting? must you not be matting? must he not be matting? must we not be matting? must you not be matting? must they not be matting?
Perfect	V-ing perfect
must I not have matted? must you not have matted? must he not have matted? must we not have matted? must you not have matted? must they not have matted?	must I not have been matting? must you not have been matting? must he not have been matting? must we not have been matting? must you not have been matting? must they not have been matting?