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