Lucy's friends play volleyball (改否定句,说明原因）
问题描述：
Lucy's friends play volleyball (改否定句,说明原因）
Teir father goes to beijing
改否定句，说明原因
答
Lucy's friends don't play volleyball.
Lucy的朋友们玩排球
...改为否定,则是不玩排球~所以否定动词 do sth变为do not do sth
Their father does not go to Beijing
第三人称单数,所以改为 does not