1.positive: I can swim.
negative: I can't talk.
question: Can you swim?
short answear: Yes,i can.
2. pos: I can play volleyball.
neg: I can't drive a car.
question: Can you drive a car in water?
short ans: no,I can't.
3. pos: I can fish.
neg: I can't talk on the phone.
question: Can you talk on the phone?
short ans: no ,I can't.