English verb conjugation
COULD CAPTAIN

Regular verb: captain - captained - captained

Affirmation

Simple form	V-ing form
I could captain you could captain he could captain we could captain you could captain they could captain	I could be captaining you could be captaining he 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 he 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 he 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 he 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 he 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 he 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 he 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 he captain? could we captain? could you captain? could they captain?	could I be captaining? could you be captaining? could he 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 he 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 he 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 he 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 he 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 he 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 he not have been captaining? could we not have been captaining? could you not have been captaining? could they not have been captaining?