He sent me a postcard asking for my photos.为什么是asking for

He sent me a postcard asking for my photos.为什么是asking for
He sent me a postcard asking for my photos.为什么是asking for

He sent me a postcard asking for my photos.为什么是asking for
现在分词作后置定语修饰postcard

“asking for my photos”是前面主句的状语从句，与主句共享同一个主语“he"，所以要用asking for而不是asked for.