jim with his friends ()in the pool now ,这里为什么填is swimming而不是are swimming
问题描述：
jim with his friends ()in the pool now ,这里为什么填is swimming而不是are swimming
答
swim是动词，+ing表示进行时，不用再加系动词
答
主语是Jim,with his friends 只是表示伴随的状态,也可以放在后面,如果将他放在后面就好理解了：Jim is swimming in the pool with his friends now.