English verb conjugation
COULD DAMP

Regular verb: damp - damped - damped

Affirmation

Simple form	V-ing form
I could damp you could damp he could damp we could damp you could damp they could damp	I could be damping you could be damping he could be damping we could be damping you could be damping they could be damping
Perfect	V-ing perfect
I could have damped you could have damped he could have damped we could have damped you could have damped they could have damped	I could have been damping you could have been damping he could have been damping we could have been damping you could have been damping they could have been damping

Negation

Simple form	V-ing form
I couldn't damp you couldn't damp he couldn't damp we couldn't damp you couldn't damp they couldn't damp	I couldn't be damping you couldn't be damping he couldn't be damping we couldn't be damping you couldn't be damping they couldn't be damping
Perfect	V-ing perfect
I couldn't have damped you couldn't have damped he couldn't have damped we couldn't have damped you couldn't have damped they couldn't have damped	I couldn't have been damping you couldn't have been damping he couldn't have been damping we couldn't have been damping you couldn't have been damping they couldn't have been damping

Interrogative form

Simple form	V-ing form
could I damp? could you damp? could he damp? could we damp? could you damp? could they damp?	could I be damping? could you be damping? could he be damping? could we be damping? could you be damping? could they be damping?
Perfect	V-ing perfect
could I have damped? could you have damped? could he have damped? could we have damped? could you have damped? could they have damped?	could I have been damping? could you have been damping? could he have been damping? could we have been damping? could you have been damping? could they have been damping?

Interro-negative form

Simple form	V-ing form
couldn't I damp? couldn't you damp? couldn't he damp? couldn't we damp? couldn't you damp? couldn't they damp?	couldn't I be damping? couldn't you be damping? couldn't he be damping? couldn't we be damping? couldn't you be damping? couldn't they be damping?
Perfect	V-ing perfect
couldn't I have damped? couldn't you have damped? couldn't he have damped? couldn't we have damped? couldn't you have damped? couldn't they have damped?	couldn't I have been damping? couldn't you have been damping? couldn't he have been damping? couldn't we have been damping? couldn't you have been damping? couldn't they have been damping?