English verb conjugation
CAN ASSERT

Regular verb: assert - asserted - asserted

Affirmation

Simple form	V-ing form
I can assert you can assert he can assert we can assert you can assert they can assert	I can be asserting you can be asserting he can be asserting we can be asserting you can be asserting they can be asserting
Perfect	V-ing perfect
I can have asserted you can have asserted he can have asserted we can have asserted you can have asserted they can have asserted	I can have been asserting you can have been asserting he can have been asserting we can have been asserting you can have been asserting they can have been asserting

Negation

Simple form	V-ing form
I can't assert you can't assert he can't assert we can't assert you can't assert they can't assert	I can't be asserting you can't be asserting he can't be asserting we can't be asserting you can't be asserting they can't be asserting
Perfect	V-ing perfect
I can't have asserted you can't have asserted he can't have asserted we can't have asserted you can't have asserted they can't have asserted	I can't have been asserting you can't have been asserting he can't have been asserting we can't have been asserting you can't have been asserting they can't have been asserting

Interrogative form

Simple form	V-ing form
can I assert? can you assert? can he assert? can we assert? can you assert? can they assert?	can I be asserting? can you be asserting? can he be asserting? can we be asserting? can you be asserting? can they be asserting?
Perfect	V-ing perfect
can I have asserted? can you have asserted? can he have asserted? can we have asserted? can you have asserted? can they have asserted?	can I have been asserting? can you have been asserting? can he have been asserting? can we have been asserting? can you have been asserting? can they have been asserting?

Interro-negative form

Simple form	V-ing form
can't I assert? can't you assert? can't he assert? can't we assert? can't you assert? can't they assert?	can't I be asserting? can't you be asserting? can't he be asserting? can't we be asserting? can't you be asserting? can't they be asserting?
Perfect	V-ing perfect
can't I have asserted? can't you have asserted? can't he have asserted? can't we have asserted? can't you have asserted? can't they have asserted?	can't I have been asserting? can't you have been asserting? can't he have been asserting? can't we have been asserting? can't you have been asserting? can't they have been asserting?