He can ... / She can ... / We can ...
What can he do? What can she do? What can we do?
- Can he jump? Yes, he can. / No, he can't.
- Can we fly? No, we can't.
- Can she sing a song? Yes, she can.
- Can he run? Yes, he can. / No, he cant.
- Can she speak English? Yes, she can. (a little bit)