新概念英语2中的问题The boy _____by the door is my brother.(stand)stan

新概念英语2中的问题The boy _____by the door is my brother.(stand)stan The boy is my brother.The boy is standing at the door.合并:The The boy who is standing at the door is my brother."who is "可 the boy whose sister is standing at the door is my brother. the boy who is standing ad the door is my brother.这句话去了从句以后主 look () the boy .he is my brother The boy( )Simon is my little brother. The boy () () me is my little brother The boy in green is my brother. The boy is my brother 对my brother提问 Is the boy( )the door? 几个英语问题请帮忙分析下句子成分The boy sleeping in bed is my brother.解释一下下面