Someone who convinces you that there really is an unlocked door just waiting for you to open it.能给我讲讲这里walking为什么要用ing形式 和其他相关的一些用法吗 =v=
问题描述：
Someone who convinces you that there really is an unlocked door just waiting for you to open it.
能给我讲讲这里walking为什么要用ing形式 和其他相关的一些用法吗 =v=
答
waiting for you to open it 作定语修饰door 因为和门是主谓关系，且表正在进行,所以用waiting。=which waits for you to open it . 建议你看语法书上非谓语动词的用法
答
waiting做door 的后置定语,相当于which is waiting for you to open it.