English verb conjugation
MUST STUD

Regular verb: stud - studded - studded

Affirmation

Simple form	V-ing form
I must stud you must stud she must stud we must stud you must stud they must stud	I must be studding you must be studding she must be studding we must be studding you must be studding they must be studding
Perfect	V-ing perfect
I must have studded you must have studded she must have studded we must have studded you must have studded they must have studded	I must have been studding you must have been studding she must have been studding we must have been studding you must have been studding they must have been studding

Negation

Simple form	V-ing form
I must not stud you must not stud she must not stud we must not stud you must not stud they must not stud	I must not be studding you must not be studding she must not be studding we must not be studding you must not be studding they must not be studding
Perfect	V-ing perfect
I must not have studded you must not have studded she must not have studded we must not have studded you must not have studded they must not have studded	I must not have been studding you must not have been studding she must not have been studding we must not have been studding you must not have been studding they must not have been studding

Interrogative form

Simple form	V-ing form
must I stud? must you stud? must she stud? must we stud? must you stud? must they stud?	must I be studding? must you be studding? must she be studding? must we be studding? must you be studding? must they be studding?
Perfect	V-ing perfect
must I have studded? must you have studded? must she have studded? must we have studded? must you have studded? must they have studded?	must I have been studding? must you have been studding? must she have been studding? must we have been studding? must you have been studding? must they have been studding?

Interro-negative form

Simple form	V-ing form
must I not stud? must you not stud? must she not stud? must we not stud? must you not stud? must they not stud?	must I not be studding? must you not be studding? must she not be studding? must we not be studding? must you not be studding? must they not be studding?
Perfect	V-ing perfect
must I not have studded? must you not have studded? must she not have studded? must we not have studded? must you not have studded? must they not have studded?	must I not have been studding? must you not have been studding? must she not have been studding? must we not have been studding? must you not have been studding? must they not have been studding?