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