I can retract you can retract she can retract we can retract you can retract they can retract
V-ing form
I can be retracting you can be retracting she can be retracting we can be retracting you can be retracting they can be retracting
Perfect
I can have retracted you can have retracted she can have retracted we can have retracted you can have retracted they can have retracted
V-ing perfect
I can have been retracting you can have been retracting she can have been retracting we can have been retracting you can have been retracting they can have been retracting
Negation
Simple form
I cannot retract you cannot retract she cannot retract we cannot retract you cannot retract they cannot retract
V-ing form
I cannot be retracting you cannot be retracting she cannot be retracting we cannot be retracting you cannot be retracting they cannot be retracting
Perfect
I cannot have retracted you cannot have retracted she cannot have retracted we cannot have retracted you cannot have retracted they cannot have retracted
V-ing perfect
I cannot have been retracting you cannot have been retracting she cannot have been retracting we cannot have been retracting you cannot have been retracting they cannot have been retracting
Interrogative form
Simple form
can I retract? can you retract? can she retract? can we retract? can you retract? can they retract?
V-ing form
can I be retracting? can you be retracting? can she be retracting? can we be retracting? can you be retracting? can they be retracting?
Perfect
can I have retracted? can you have retracted? can she have retracted? can we have retracted? can you have retracted? can they have retracted?
V-ing perfect
can I have been retracting? can you have been retracting? can she have been retracting? can we have been retracting? can you have been retracting? can they have been retracting?
Interro-negative form
Simple form
can I not retract? can you not retract? can she not retract? can we not retract? can you not retract? can they not retract?
V-ing form
can I not be retracting? can you not be retracting? can she not be retracting? can we not be retracting? can you not be retracting? can they not be retracting?
Perfect
can I not have retracted? can you not have retracted? can she not have retracted? can we not have retracted? can you not have retracted? can they not have retracted?
V-ing perfect
can I not have been retracting? can you not have been retracting? can she not have been retracting? can we not have been retracting? can you not have been retracting? can they not have been retracting?