English verb conjugation
COULD RETRACT

Regular verb: retract - retracted - retracted

Affirmation

Simple form	V-ing form
I could retract you could retract he could retract we could retract you could retract they could retract	I could be retracting you could be retracting he could be retracting we could be retracting you could be retracting they could be retracting
Perfect	V-ing perfect
I could have retracted you could have retracted he could have retracted we could have retracted you could have retracted they could have retracted	I could have been retracting you could have been retracting he could have been retracting we could have been retracting you could have been retracting they could have been retracting

Negation

Simple form	V-ing form
I couldn't retract you couldn't retract he couldn't retract we couldn't retract you couldn't retract they couldn't retract	I couldn't be retracting you couldn't be retracting he couldn't be retracting we couldn't be retracting you couldn't be retracting they couldn't be retracting
Perfect	V-ing perfect
I couldn't have retracted you couldn't have retracted he couldn't have retracted we couldn't have retracted you couldn't have retracted they couldn't have retracted	I couldn't have been retracting you couldn't have been retracting he couldn't have been retracting we couldn't have been retracting you couldn't have been retracting they couldn't have been retracting

Interrogative form

Simple form	V-ing form
could I retract? could you retract? could he retract? could we retract? could you retract? could they retract?	could I be retracting? could you be retracting? could he be retracting? could we be retracting? could you be retracting? could they be retracting?
Perfect	V-ing perfect
could I have retracted? could you have retracted? could he have retracted? could we have retracted? could you have retracted? could they have retracted?	could I have been retracting? could you have been retracting? could he have been retracting? could we have been retracting? could you have been retracting? could they have been retracting?

Interro-negative form

Simple form	V-ing form
couldn't I retract? couldn't you retract? couldn't he retract? couldn't we retract? couldn't you retract? couldn't they retract?	couldn't I be retracting? couldn't you be retracting? couldn't he be retracting? couldn't we be retracting? couldn't you be retracting? couldn't they be retracting?
Perfect	V-ing perfect
couldn't I have retracted? couldn't you have retracted? couldn't he have retracted? couldn't we have retracted? couldn't you have retracted? couldn't they have retracted?	couldn't I have been retracting? couldn't you have been retracting? couldn't he have been retracting? couldn't we have been retracting? couldn't you have been retracting? couldn't they have been retracting?