English verb conjugation
CAN RETRACT

Regular verb: retract - retracted - retracted

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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