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 can't oppugn you can't oppugn he can't oppugn we can't oppugn you can't oppugn they can't oppugn	I can't be oppugning you can't be oppugning he can't be oppugning we can't be oppugning you can't be oppugning they can't be oppugning
Perfect	V-ing perfect
I can't have oppugned you can't have oppugned he can't have oppugned we can't have oppugned you can't have oppugned they can't have oppugned	I can't have been oppugning you can't have been oppugning he can't have been oppugning we can't have been oppugning you can't have been oppugning they can't 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't I oppugn? can't you oppugn? can't he oppugn? can't we oppugn? can't you oppugn? can't they oppugn?	can't I be oppugning? can't you be oppugning? can't he be oppugning? can't we be oppugning? can't you be oppugning? can't they be oppugning?
Perfect	V-ing perfect
can't I have oppugned? can't you have oppugned? can't he have oppugned? can't we have oppugned? can't you have oppugned? can't they have oppugned?	can't I have been oppugning? can't you have been oppugning? can't he have been oppugning? can't we have been oppugning? can't you have been oppugning? can't they have been oppugning?