English verb conjugation
MUST OPPUGN

Regular verb: oppugn - oppugned - oppugned

Affirmation

Simple form	V-ing form
I must oppugn you must oppugn he must oppugn we must oppugn you must oppugn they must oppugn	I must be oppugning you must be oppugning he must be oppugning we must be oppugning you must be oppugning they must be oppugning
Perfect	V-ing perfect
I must have oppugned you must have oppugned he must have oppugned we must have oppugned you must have oppugned they must have oppugned	I must have been oppugning you must have been oppugning he must have been oppugning we must have been oppugning you must have been oppugning they must have been oppugning

Negation

Simple form	V-ing form
I must not oppugn you must not oppugn he must not oppugn we must not oppugn you must not oppugn they must not oppugn	I must not be oppugning you must not be oppugning he must not be oppugning we must not be oppugning you must not be oppugning they must not be oppugning
Perfect	V-ing perfect
I must not have oppugned you must not have oppugned he must not have oppugned we must not have oppugned you must not have oppugned they must not have oppugned	I must not have been oppugning you must not have been oppugning he must not have been oppugning we must not have been oppugning you must not have been oppugning they must not have been oppugning

Interrogative form

Simple form	V-ing form
must I oppugn? must you oppugn? must he oppugn? must we oppugn? must you oppugn? must they oppugn?	must I be oppugning? must you be oppugning? must he be oppugning? must we be oppugning? must you be oppugning? must they be oppugning?
Perfect	V-ing perfect
must I have oppugned? must you have oppugned? must he have oppugned? must we have oppugned? must you have oppugned? must they have oppugned?	must I have been oppugning? must you have been oppugning? must he have been oppugning? must we have been oppugning? must you have been oppugning? must they have been oppugning?

Interro-negative form

Simple form	V-ing form
must I not oppugn? must you not oppugn? must he not oppugn? must we not oppugn? must you not oppugn? must they not oppugn?	must I not be oppugning? must you not be oppugning? must he not be oppugning? must we not be oppugning? must you not be oppugning? must they not be oppugning?
Perfect	V-ing perfect
must I not have oppugned? must you not have oppugned? must he not have oppugned? must we not have oppugned? must you not have oppugned? must they not have oppugned?	must I not have been oppugning? must you not have been oppugning? must he not have been oppugning? must we not have been oppugning? must you not have been oppugning? must they not have been oppugning?