English verb conjugation
CAN RING

Irregular verb: ring - rang - rung

Affirmation

Simple form	V-ing form
I can ring you can ring he can ring we can ring you can ring they can ring	I can be ringing you can be ringing he can be ringing we can be ringing you can be ringing they can be ringing
Perfect	V-ing perfect
I can have rung you can have rung he can have rung we can have rung you can have rung they can have rung	I can have been ringing you can have been ringing he can have been ringing we can have been ringing you can have been ringing they can have been ringing

Negation

Simple form	V-ing form
I cannot ring you cannot ring he cannot ring we cannot ring you cannot ring they cannot ring	I cannot be ringing you cannot be ringing he cannot be ringing we cannot be ringing you cannot be ringing they cannot be ringing
Perfect	V-ing perfect
I cannot have rung you cannot have rung he cannot have rung we cannot have rung you cannot have rung they cannot have rung	I cannot have been ringing you cannot have been ringing he cannot have been ringing we cannot have been ringing you cannot have been ringing they cannot have been ringing

Interrogative form

Simple form	V-ing form
can I ring? can you ring? can he ring? can we ring? can you ring? can they ring?	can I be ringing? can you be ringing? can he be ringing? can we be ringing? can you be ringing? can they be ringing?
Perfect	V-ing perfect
can I have rung? can you have rung? can he have rung? can we have rung? can you have rung? can they have rung?	can I have been ringing? can you have been ringing? can he have been ringing? can we have been ringing? can you have been ringing? can they have been ringing?

Interro-negative form

Simple form	V-ing form
can I not ring? can you not ring? can he not ring? can we not ring? can you not ring? can they not ring?	can I not be ringing? can you not be ringing? can he not be ringing? can we not be ringing? can you not be ringing? can they not be ringing?
Perfect	V-ing perfect
can I not have rung? can you not have rung? can he not have rung? can we not have rung? can you not have rung? can they not have rung?	can I not have been ringing? can you not have been ringing? can he not have been ringing? can we not have been ringing? can you not have been ringing? can they not have been ringing?