All the students in the class except the sick boy ——（encourage）to plant trees yesterday被动语态
问题描述：
All the students in the class except the sick boy ——（encourage）to plant trees yesterday被动语态
答
were encouraged,except the sick boy作为一个插入语,可以首先将其隐藏,真正的主语是All the students,所以用复数,又是昨天,所以是were