they are -------(happy)boys aer playing -------(happy）
问题描述：
they are -------(happy)boys aer playing -------(happy）
答
happy;happiy 第一个修饰的是boys,boys是名词（n）,所以用形容词（adj）形式;第二个是修饰playing,是动词(v)，所以用副词(adv0形式
答
happy happily
答
They are --happy-----(happy)boys aer playing --happily.