English verb conjugation
COULD VOWELIZE

Regular verb: vowelize - vowelized - vowelized

Affirmation

Simple form	V-ing form
I could vowelize you could vowelize he could vowelize we could vowelize you could vowelize they could vowelize	I could be vowelizing you could be vowelizing he could be vowelizing we could be vowelizing you could be vowelizing they could be vowelizing
Perfect	V-ing perfect
I could have vowelized you could have vowelized he could have vowelized we could have vowelized you could have vowelized they could have vowelized	I could have been vowelizing you could have been vowelizing he could have been vowelizing we could have been vowelizing you could have been vowelizing they could have been vowelizing

Negation

Simple form	V-ing form
I couldn't vowelize you couldn't vowelize he couldn't vowelize we couldn't vowelize you couldn't vowelize they couldn't vowelize	I couldn't be vowelizing you couldn't be vowelizing he couldn't be vowelizing we couldn't be vowelizing you couldn't be vowelizing they couldn't be vowelizing
Perfect	V-ing perfect
I couldn't have vowelized you couldn't have vowelized he couldn't have vowelized we couldn't have vowelized you couldn't have vowelized they couldn't have vowelized	I couldn't have been vowelizing you couldn't have been vowelizing he couldn't have been vowelizing we couldn't have been vowelizing you couldn't have been vowelizing they couldn't have been vowelizing

Interrogative form

Simple form	V-ing form
could I vowelize? could you vowelize? could he vowelize? could we vowelize? could you vowelize? could they vowelize?	could I be vowelizing? could you be vowelizing? could he be vowelizing? could we be vowelizing? could you be vowelizing? could they be vowelizing?
Perfect	V-ing perfect
could I have vowelized? could you have vowelized? could he have vowelized? could we have vowelized? could you have vowelized? could they have vowelized?	could I have been vowelizing? could you have been vowelizing? could he have been vowelizing? could we have been vowelizing? could you have been vowelizing? could they have been vowelizing?

Interro-negative form

Simple form	V-ing form
couldn't I vowelize? couldn't you vowelize? couldn't he vowelize? couldn't we vowelize? couldn't you vowelize? couldn't they vowelize?	couldn't I be vowelizing? couldn't you be vowelizing? couldn't he be vowelizing? couldn't we be vowelizing? couldn't you be vowelizing? couldn't they be vowelizing?
Perfect	V-ing perfect
couldn't I have vowelized? couldn't you have vowelized? couldn't he have vowelized? couldn't we have vowelized? couldn't you have vowelized? couldn't they have vowelized?	couldn't I have been vowelizing? couldn't you have been vowelizing? couldn't he have been vowelizing? couldn't we have been vowelizing? couldn't you have been vowelizing? couldn't they have been vowelizing?