English verb conjugation
COULD CLAMP

Regular verb: clamp - clamped - clamped

Affirmation

Simple form	V-ing form
I could clamp you could clamp he could clamp we could clamp you could clamp they could clamp	I could be clamping you could be clamping he could be clamping we could be clamping you could be clamping they could be clamping
Perfect	V-ing perfect
I could have clamped you could have clamped he could have clamped we could have clamped you could have clamped they could have clamped	I could have been clamping you could have been clamping he could have been clamping we could have been clamping you could have been clamping they could have been clamping

Negation

Simple form	V-ing form
I couldn't clamp you couldn't clamp he couldn't clamp we couldn't clamp you couldn't clamp they couldn't clamp	I couldn't be clamping you couldn't be clamping he couldn't be clamping we couldn't be clamping you couldn't be clamping they couldn't be clamping
Perfect	V-ing perfect
I couldn't have clamped you couldn't have clamped he couldn't have clamped we couldn't have clamped you couldn't have clamped they couldn't have clamped	I couldn't have been clamping you couldn't have been clamping he couldn't have been clamping we couldn't have been clamping you couldn't have been clamping they couldn't have been clamping

Interrogative form

Simple form	V-ing form
could I clamp? could you clamp? could he clamp? could we clamp? could you clamp? could they clamp?	could I be clamping? could you be clamping? could he be clamping? could we be clamping? could you be clamping? could they be clamping?
Perfect	V-ing perfect
could I have clamped? could you have clamped? could he have clamped? could we have clamped? could you have clamped? could they have clamped?	could I have been clamping? could you have been clamping? could he have been clamping? could we have been clamping? could you have been clamping? could they have been clamping?

Interro-negative form

Simple form	V-ing form
couldn't I clamp? couldn't you clamp? couldn't he clamp? couldn't we clamp? couldn't you clamp? couldn't they clamp?	couldn't I be clamping? couldn't you be clamping? couldn't he be clamping? couldn't we be clamping? couldn't you be clamping? couldn't they be clamping?
Perfect	V-ing perfect
couldn't I have clamped? couldn't you have clamped? couldn't he have clamped? couldn't we have clamped? couldn't you have clamped? couldn't they have clamped?	couldn't I have been clamping? couldn't you have been clamping? couldn't he have been clamping? couldn't we have been clamping? couldn't you have been clamping? couldn't they have been clamping?