楼上所举的两个例子中的非谓语动词应该是done,而be和being起的作用是助动词. be做非谓语动词应该是比少见的,但不能说没有,比如一个著名的例子：to be or not to be, that is a question. 这里的be就是不定时形式.另外例如Being so poor at that time,we couldn't afford to buy a TV set.这里的Being也是现在分词
