English verb conjugation
CAN OPPUGN

Regular verb: oppugn - oppugned - oppugned

Affirmation

Simple form	V-ing form
I can oppugn you can oppugn she can oppugn we can oppugn you can oppugn they can oppugn	I can be oppugning you can be oppugning she 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 she 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 she 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 she cannot oppugn we cannot oppugn you cannot oppugn they cannot oppugn	I cannot be oppugning you cannot be oppugning she 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 she 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 she 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 she oppugn? can we oppugn? can you oppugn? can they oppugn?	can I be oppugning? can you be oppugning? can she 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 she 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 she 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 she 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 she 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 she 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 she not have been oppugning? can we not have been oppugning? can you not have been oppugning? can they not have been oppugning?