English verb conjugation
COULD UTTER

Regular verb: utter - uttered - uttered

Affirmation

Simple form	V-ing form
I could utter you could utter she could utter we could utter you could utter they could utter	I could be uttering you could be uttering she could be uttering we could be uttering you could be uttering they could be uttering
Perfect	V-ing perfect
I could have uttered you could have uttered she could have uttered we could have uttered you could have uttered they could have uttered	I could have been uttering you could have been uttering she could have been uttering we could have been uttering you could have been uttering they could have been uttering

Negation

Simple form	V-ing form
I couldn't utter you couldn't utter she couldn't utter we couldn't utter you couldn't utter they couldn't utter	I couldn't be uttering you couldn't be uttering she couldn't be uttering we couldn't be uttering you couldn't be uttering they couldn't be uttering
Perfect	V-ing perfect
I couldn't have uttered you couldn't have uttered she couldn't have uttered we couldn't have uttered you couldn't have uttered they couldn't have uttered	I couldn't have been uttering you couldn't have been uttering she couldn't have been uttering we couldn't have been uttering you couldn't have been uttering they couldn't have been uttering

Interrogative form

Simple form	V-ing form
could I utter? could you utter? could she utter? could we utter? could you utter? could they utter?	could I be uttering? could you be uttering? could she be uttering? could we be uttering? could you be uttering? could they be uttering?
Perfect	V-ing perfect
could I have uttered? could you have uttered? could she have uttered? could we have uttered? could you have uttered? could they have uttered?	could I have been uttering? could you have been uttering? could she have been uttering? could we have been uttering? could you have been uttering? could they have been uttering?

Interro-negative form

Simple form	V-ing form
couldn't I utter? couldn't you utter? couldn't she utter? couldn't we utter? couldn't you utter? couldn't they utter?	couldn't I be uttering? couldn't you be uttering? couldn't she be uttering? couldn't we be uttering? couldn't you be uttering? couldn't they be uttering?
Perfect	V-ing perfect
couldn't I have uttered? couldn't you have uttered? couldn't she have uttered? couldn't we have uttered? couldn't you have uttered? couldn't they have uttered?	couldn't I have been uttering? couldn't you have been uttering? couldn't she have been uttering? couldn't we have been uttering? couldn't you have been uttering? couldn't they have been uttering?