can ulcerate
Regular verb: ulcerate - ulcerated- ulcerated

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