English verb conjugation
CAN ULCERATE

Regular verb: ulcerate - ulcerated - ulcerated

Affirmation

Simple form	V-ing form
I can ulcerate you can ulcerate he can ulcerate we can ulcerate you can ulcerate they can ulcerate	I can be ulcerating you can be ulcerating he can be ulcerating we can be ulcerating you can be ulcerating they can be ulcerating
Perfect	V-ing perfect
I can have ulcerated you can have ulcerated he can have ulcerated we can have ulcerated you can have ulcerated they can have ulcerated	I can have been ulcerating you can have been ulcerating he can have been ulcerating we can have been ulcerating you can have been ulcerating they can have been ulcerating

Negation

Simple form	V-ing form
I can't ulcerate you can't ulcerate he can't ulcerate we can't ulcerate you can't ulcerate they can't ulcerate	I can't be ulcerating you can't be ulcerating he can't be ulcerating we can't be ulcerating you can't be ulcerating they can't be ulcerating
Perfect	V-ing perfect
I can't have ulcerated you can't have ulcerated he can't have ulcerated we can't have ulcerated you can't have ulcerated they can't have ulcerated	I can't have been ulcerating you can't have been ulcerating he can't have been ulcerating we can't have been ulcerating you can't have been ulcerating they can't have been ulcerating

Interrogative form

Simple form	V-ing form
can I ulcerate? can you ulcerate? can he ulcerate? can we ulcerate? can you ulcerate? can they ulcerate?	can I be ulcerating? can you be ulcerating? can he be ulcerating? can we be ulcerating? can you be ulcerating? can they be ulcerating?
Perfect	V-ing perfect
can I have ulcerated? can you have ulcerated? can he have ulcerated? can we have ulcerated? can you have ulcerated? can they have ulcerated?	can I have been ulcerating? can you have been ulcerating? can he have been ulcerating? can we have been ulcerating? can you have been ulcerating? can they have been ulcerating?

Interro-negative form

Simple form	V-ing form
can't I ulcerate? can't you ulcerate? can't he ulcerate? can't we ulcerate? can't you ulcerate? can't they ulcerate?	can't I be ulcerating? can't you be ulcerating? can't he be ulcerating? can't we be ulcerating? can't you be ulcerating? can't they be ulcerating?
Perfect	V-ing perfect
can't I have ulcerated? can't you have ulcerated? can't he have ulcerated? can't we have ulcerated? can't you have ulcerated? can't they have ulcerated?	can't I have been ulcerating? can't you have been ulcerating? can't he have been ulcerating? can't we have been ulcerating? can't you have been ulcerating? can't they have been ulcerating?