Unit1 can you play the guitar?can的特点:1.后面必须跟动词原形 2.没有人称和数的变化 3.变否定直接加not(cant),变疑问句直接提前can的用法:1.表示能力 :I can play basketball. 2. 表示请求,允许:Can you help me? / Can I play computer games? 3.表示推测: He cant be at home. He went to Beijing yesterday.join 加入组织,成为组织的一员,加入某人:join the army 参军/join the art club/ join usjoin in =take part in 参加活动 join in the basketball gamebe in 参加一次性的活动 You can be in our music festival.the swimming club / the st