与发展对象关系是什么:急问众高手：be used for 后面的成分是宾语么？如果不是，那是什么？

急问众高手：be used for 后面的成分是宾语么？如果不是，那是什么？ This feature is to be used for authorize Standing in line for what used to be mine used to be 是什么意思 there used to be used to be used to be Discuss the ways the intertnet can be used for educational purposes There used to be a true love for me.But I didn't cherish it. DTD’s used for