English verb conjugation
MUST SCRATCH

Regular verb: scratch - scratched - scratched

Affirmation

Simple form	V-ing form
I must scratch you must scratch she must scratch we must scratch you must scratch they must scratch	I must be scratching you must be scratching she must be scratching we must be scratching you must be scratching they must be scratching
Perfect	V-ing perfect
I must have scratched you must have scratched she must have scratched we must have scratched you must have scratched they must have scratched	I must have been scratching you must have been scratching she must have been scratching we must have been scratching you must have been scratching they must have been scratching

Negation

Simple form	V-ing form
I must not scratch you must not scratch she must not scratch we must not scratch you must not scratch they must not scratch	I must not be scratching you must not be scratching she must not be scratching we must not be scratching you must not be scratching they must not be scratching
Perfect	V-ing perfect
I must not have scratched you must not have scratched she must not have scratched we must not have scratched you must not have scratched they must not have scratched	I must not have been scratching you must not have been scratching she must not have been scratching we must not have been scratching you must not have been scratching they must not have been scratching

Interrogative form

Simple form	V-ing form
must I scratch? must you scratch? must she scratch? must we scratch? must you scratch? must they scratch?	must I be scratching? must you be scratching? must she be scratching? must we be scratching? must you be scratching? must they be scratching?
Perfect	V-ing perfect
must I have scratched? must you have scratched? must she have scratched? must we have scratched? must you have scratched? must they have scratched?	must I have been scratching? must you have been scratching? must she have been scratching? must we have been scratching? must you have been scratching? must they have been scratching?

Interro-negative form

Simple form	V-ing form
must I not scratch? must you not scratch? must she not scratch? must we not scratch? must you not scratch? must they not scratch?	must I not be scratching? must you not be scratching? must she not be scratching? must we not be scratching? must you not be scratching? must they not be scratching?
Perfect	V-ing perfect
must I not have scratched? must you not have scratched? must she not have scratched? must we not have scratched? must you not have scratched? must they not have scratched?	must I not have been scratching? must you not have been scratching? must she not have been scratching? must we not have been scratching? must you not have been scratching? must they not have been scratching?