情态动词 can/can't 用法 — 英语词汇题

选出下列句子完全正确的一项，并说明另外两句错在哪里。Mike 在向朋友介绍自己家的规矩（family rules）：他周末可以看电视，但是不能玩电脑游戏。下列表达完全正确的一项是（　） A. I can watches TV on the weekend, but I can't plays computer games. B. I can watch TV on the weekend, but I can't play computer games. C. I can watch TV on the weekend, but I can't plays computer games.