I can iterate you can iterate she can iterate we can iterate you can iterate they can iterate
V-ing form
I can be iterating you can be iterating she can be iterating we can be iterating you can be iterating they can be iterating
Perfect
I can have iterated you can have iterated she can have iterated we can have iterated you can have iterated they can have iterated
V-ing perfect
I can have been iterating you can have been iterating she can have been iterating we can have been iterating you can have been iterating they can have been iterating
Negation
Simple form
I cannot iterate you cannot iterate she cannot iterate we cannot iterate you cannot iterate they cannot iterate
V-ing form
I cannot be iterating you cannot be iterating she cannot be iterating we cannot be iterating you cannot be iterating they cannot be iterating
Perfect
I cannot have iterated you cannot have iterated she cannot have iterated we cannot have iterated you cannot have iterated they cannot have iterated
V-ing perfect
I cannot have been iterating you cannot have been iterating she cannot have been iterating we cannot have been iterating you cannot have been iterating they cannot have been iterating
Interrogative form
Simple form
can I iterate? can you iterate? can she iterate? can we iterate? can you iterate? can they iterate?
V-ing form
can I be iterating? can you be iterating? can she be iterating? can we be iterating? can you be iterating? can they be iterating?
Perfect
can I have iterated? can you have iterated? can she have iterated? can we have iterated? can you have iterated? can they have iterated?
V-ing perfect
can I have been iterating? can you have been iterating? can she have been iterating? can we have been iterating? can you have been iterating? can they have been iterating?
Interro-negative form
Simple form
can I not iterate? can you not iterate? can she not iterate? can we not iterate? can you not iterate? can they not iterate?
V-ing form
can I not be iterating? can you not be iterating? can she not be iterating? can we not be iterating? can you not be iterating? can they not be iterating?
Perfect
can I not have iterated? can you not have iterated? can she not have iterated? can we not have iterated? can you not have iterated? can they not have iterated?
V-ing perfect
can I not have been iterating? can you not have been iterating? can she not have been iterating? can we not have been iterating? can you not have been iterating? can they not have been iterating?