English verb conjugation
COULD CLUTTER

Regular verb: clutter - cluttered - cluttered

Affirmation

Simple form	V-ing form
I could clutter you could clutter she could clutter we could clutter you could clutter they could clutter	I could be cluttering you could be cluttering she could be cluttering we could be cluttering you could be cluttering they could be cluttering
Perfect	V-ing perfect
I could have cluttered you could have cluttered she could have cluttered we could have cluttered you could have cluttered they could have cluttered	I could have been cluttering you could have been cluttering she could have been cluttering we could have been cluttering you could have been cluttering they could have been cluttering

Negation

Simple form	V-ing form
I couldn't clutter you couldn't clutter she couldn't clutter we couldn't clutter you couldn't clutter they couldn't clutter	I couldn't be cluttering you couldn't be cluttering she couldn't be cluttering we couldn't be cluttering you couldn't be cluttering they couldn't be cluttering
Perfect	V-ing perfect
I couldn't have cluttered you couldn't have cluttered she couldn't have cluttered we couldn't have cluttered you couldn't have cluttered they couldn't have cluttered	I couldn't have been cluttering you couldn't have been cluttering she couldn't have been cluttering we couldn't have been cluttering you couldn't have been cluttering they couldn't have been cluttering

Interrogative form

Simple form	V-ing form
could I clutter? could you clutter? could she clutter? could we clutter? could you clutter? could they clutter?	could I be cluttering? could you be cluttering? could she be cluttering? could we be cluttering? could you be cluttering? could they be cluttering?
Perfect	V-ing perfect
could I have cluttered? could you have cluttered? could she have cluttered? could we have cluttered? could you have cluttered? could they have cluttered?	could I have been cluttering? could you have been cluttering? could she have been cluttering? could we have been cluttering? could you have been cluttering? could they have been cluttering?

Interro-negative form

Simple form	V-ing form
couldn't I clutter? couldn't you clutter? couldn't she clutter? couldn't we clutter? couldn't you clutter? couldn't they clutter?	couldn't I be cluttering? couldn't you be cluttering? couldn't she be cluttering? couldn't we be cluttering? couldn't you be cluttering? couldn't they be cluttering?
Perfect	V-ing perfect
couldn't I have cluttered? couldn't you have cluttered? couldn't she have cluttered? couldn't we have cluttered? couldn't you have cluttered? couldn't they have cluttered?	couldn't I have been cluttering? couldn't you have been cluttering? couldn't she have been cluttering? couldn't we have been cluttering? couldn't you have been cluttering? couldn't they have been cluttering?