English verb conjugation
CAN OPPUGN

Regular verb: oppugn - oppugned - oppugned

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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