English verb conjugation
MUST DISCOVER

Regular verb: discover - discovered - discovered

Affirmation

Simple form	V-ing form
I must discover you must discover he must discover we must discover you must discover they must discover	I must be discovering you must be discovering he must be discovering we must be discovering you must be discovering they must be discovering
Perfect	V-ing perfect
I must have discovered you must have discovered he must have discovered we must have discovered you must have discovered they must have discovered	I must have been discovering you must have been discovering he must have been discovering we must have been discovering you must have been discovering they must have been discovering

Negation

Simple form	V-ing form
I must not discover you must not discover he must not discover we must not discover you must not discover they must not discover	I must not be discovering you must not be discovering he must not be discovering we must not be discovering you must not be discovering they must not be discovering
Perfect	V-ing perfect
I must not have discovered you must not have discovered he must not have discovered we must not have discovered you must not have discovered they must not have discovered	I must not have been discovering you must not have been discovering he must not have been discovering we must not have been discovering you must not have been discovering they must not have been discovering

Interrogative form

Simple form	V-ing form
must I discover? must you discover? must he discover? must we discover? must you discover? must they discover?	must I be discovering? must you be discovering? must he be discovering? must we be discovering? must you be discovering? must they be discovering?
Perfect	V-ing perfect
must I have discovered? must you have discovered? must he have discovered? must we have discovered? must you have discovered? must they have discovered?	must I have been discovering? must you have been discovering? must he have been discovering? must we have been discovering? must you have been discovering? must they have been discovering?

Interro-negative form

Simple form	V-ing form
must I not discover? must you not discover? must he not discover? must we not discover? must you not discover? must they not discover?	must I not be discovering? must you not be discovering? must he not be discovering? must we not be discovering? must you not be discovering? must they not be discovering?
Perfect	V-ing perfect
must I not have discovered? must you not have discovered? must he not have discovered? must we not have discovered? must you not have discovered? must they not have discovered?	must I not have been discovering? must you not have been discovering? must he not have been discovering? must we not have been discovering? must you not have been discovering? must they not have been discovering?