English verb conjugation
COULD RETOOL

Regular verb: retool - retooled - retooled

Affirmation

Simple form	V-ing form
I could retool you could retool he could retool we could retool you could retool they could retool	I could be retooling you could be retooling he 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 he 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 he 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 couldn't retool you couldn't retool he couldn't retool we couldn't retool you couldn't retool they couldn't retool	I couldn't be retooling you couldn't be retooling he couldn't be retooling we couldn't be retooling you couldn't be retooling they couldn't be retooling
Perfect	V-ing perfect
I couldn't have retooled you couldn't have retooled he couldn't have retooled we couldn't have retooled you couldn't have retooled they couldn't have retooled	I couldn't have been retooling you couldn't have been retooling he couldn't have been retooling we couldn't have been retooling you couldn't have been retooling they couldn't have been retooling

Interrogative form

Simple form	V-ing form
could I retool? could you retool? could he retool? could we retool? could you retool? could they retool?	could I be retooling? could you be retooling? could he 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 he 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 he 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
couldn't I retool? couldn't you retool? couldn't he retool? couldn't we retool? couldn't you retool? couldn't they retool?	couldn't I be retooling? couldn't you be retooling? couldn't he be retooling? couldn't we be retooling? couldn't you be retooling? couldn't they be retooling?
Perfect	V-ing perfect
couldn't I have retooled? couldn't you have retooled? couldn't he have retooled? couldn't we have retooled? couldn't you have retooled? couldn't they have retooled?	couldn't I have been retooling? couldn't you have been retooling? couldn't he have been retooling? couldn't we have been retooling? couldn't you have been retooling? couldn't they have been retooling?