They are picking the apples 变被动语态
问题描述：
They are picking the apples 变被动语态
答
the apples are picked by them.
把主语和宾语的位置掉换，加上be+过去分词。 在加个by 表示动作的发出者
答
The appales are being picked by them.
答
The apples are beening picked by them.