English verb conjugation
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Regular verb: ulcerate - ulcerated - ulcerated

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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