English verb conjugation
COULD RETOOL

Regular verb: retool - retooled - retooled

Affirmation

Simple form	V-ing form
I could retool you could retool she could retool we could retool you could retool they could retool	I could be retooling you could be retooling she could be retooling we could be retooling you could be retooling they could be retooling
Perfect	V-ing perfect
I could have retooled you could have retooled she could have retooled we could have retooled you could have retooled they could have retooled	I could have been retooling you could have been retooling she could have been retooling we could have been retooling you could have been retooling they could have been retooling

Negation

Simple form	V-ing form
I could not retool you could not retool she could not retool we could not retool you could not retool they could not retool	I could not be retooling you could not be retooling she could not be retooling we could not be retooling you could not be retooling they could not be retooling
Perfect	V-ing perfect
I could not have retooled you could not have retooled she could not have retooled we could not have retooled you could not have retooled they could not have retooled	I could not have been retooling you could not have been retooling she could not have been retooling we could not have been retooling you could not have been retooling they could not have been retooling

Interrogative form

Simple form	V-ing form
could I retool? could you retool? could she retool? could we retool? could you retool? could they retool?	could I be retooling? could you be retooling? could she be retooling? could we be retooling? could you be retooling? could they be retooling?
Perfect	V-ing perfect
could I have retooled? could you have retooled? could she have retooled? could we have retooled? could you have retooled? could they have retooled?	could I have been retooling? could you have been retooling? could she have been retooling? could we have been retooling? could you have been retooling? could they have been retooling?

Interro-negative form

Simple form	V-ing form
could I not retool? could you not retool? could she not retool? could we not retool? could you not retool? could they not retool?	could I not be retooling? could you not be retooling? could she not be retooling? could we not be retooling? could you not be retooling? could they not be retooling?
Perfect	V-ing perfect
could I not have retooled? could you not have retooled? could she not have retooled? could we not have retooled? could you not have retooled? could they not have retooled?	could I not have been retooling? could you not have been retooling? could she not have been retooling? could we not have been retooling? could you not have been retooling? could they not have been retooling?