能力类动词短语 — 英语阅读题

Read the short passage and answer the question. Hello! My name is Ben. I am nine years old. I can swim, but I can't sing. My sister Alice is seven. She can dance very well, and she can draw nice pictures too. But she can't swim. My friend Joe can play football and he can swim fast. He can't dance. We often play together after school. Question: What can Ben do, and what can't he do?