English verb conjugation
COULD CAPTAIN

Regular verb: captain - captained - captained

Affirmation

Simple form	V-ing form
I could captain you could captain she could captain we could captain you could captain they could captain	I could be captaining you could be captaining she could be captaining we could be captaining you could be captaining they could be captaining
Perfect	V-ing perfect
I could have captained you could have captained she could have captained we could have captained you could have captained they could have captained	I could have been captaining you could have been captaining she could have been captaining we could have been captaining you could have been captaining they could have been captaining

Negation

Simple form	V-ing form
I could not captain you could not captain she could not captain we could not captain you could not captain they could not captain	I could not be captaining you could not be captaining she could not be captaining we could not be captaining you could not be captaining they could not be captaining
Perfect	V-ing perfect
I could not have captained you could not have captained she could not have captained we could not have captained you could not have captained they could not have captained	I could not have been captaining you could not have been captaining she could not have been captaining we could not have been captaining you could not have been captaining they could not have been captaining

Interrogative form

Simple form	V-ing form
could I captain? could you captain? could she captain? could we captain? could you captain? could they captain?	could I be captaining? could you be captaining? could she be captaining? could we be captaining? could you be captaining? could they be captaining?
Perfect	V-ing perfect
could I have captained? could you have captained? could she have captained? could we have captained? could you have captained? could they have captained?	could I have been captaining? could you have been captaining? could she have been captaining? could we have been captaining? could you have been captaining? could they have been captaining?

Interro-negative form

Simple form	V-ing form
could I not captain? could you not captain? could she not captain? could we not captain? could you not captain? could they not captain?	could I not be captaining? could you not be captaining? could she not be captaining? could we not be captaining? could you not be captaining? could they not be captaining?
Perfect	V-ing perfect
could I not have captained? could you not have captained? could she not have captained? could we not have captained? could you not have captained? could they not have captained?	could I not have been captaining? could you not have been captaining? could she not have been captaining? could we not have been captaining? could you not have been captaining? could they not have been captaining?