English verb conjugation
COULD PUTTER

Regular verb: putter - puttered - puttered

Affirmation

Simple form	V-ing form
I could putter you could putter he could putter we could putter you could putter they could putter	I could be puttering you could be puttering he could be puttering we could be puttering you could be puttering they could be puttering
Perfect	V-ing perfect
I could have puttered you could have puttered he could have puttered we could have puttered you could have puttered they could have puttered	I could have been puttering you could have been puttering he could have been puttering we could have been puttering you could have been puttering they could have been puttering

Negation

Simple form	V-ing form
I couldn't putter you couldn't putter he couldn't putter we couldn't putter you couldn't putter they couldn't putter	I couldn't be puttering you couldn't be puttering he couldn't be puttering we couldn't be puttering you couldn't be puttering they couldn't be puttering
Perfect	V-ing perfect
I couldn't have puttered you couldn't have puttered he couldn't have puttered we couldn't have puttered you couldn't have puttered they couldn't have puttered	I couldn't have been puttering you couldn't have been puttering he couldn't have been puttering we couldn't have been puttering you couldn't have been puttering they couldn't have been puttering

Interrogative form

Simple form	V-ing form
could I putter? could you putter? could he putter? could we putter? could you putter? could they putter?	could I be puttering? could you be puttering? could he be puttering? could we be puttering? could you be puttering? could they be puttering?
Perfect	V-ing perfect
could I have puttered? could you have puttered? could he have puttered? could we have puttered? could you have puttered? could they have puttered?	could I have been puttering? could you have been puttering? could he have been puttering? could we have been puttering? could you have been puttering? could they have been puttering?

Interro-negative form

Simple form	V-ing form
couldn't I putter? couldn't you putter? couldn't he putter? couldn't we putter? couldn't you putter? couldn't they putter?	couldn't I be puttering? couldn't you be puttering? couldn't he be puttering? couldn't we be puttering? couldn't you be puttering? couldn't they be puttering?
Perfect	V-ing perfect
couldn't I have puttered? couldn't you have puttered? couldn't he have puttered? couldn't we have puttered? couldn't you have puttered? couldn't they have puttered?	couldn't I have been puttering? couldn't you have been puttering? couldn't he have been puttering? couldn't we have been puttering? couldn't you have been puttering? couldn't they have been puttering?