consist of和be consist of 的区别

问题描述:

consist of和be consist of 的区别

没有 be consist of 这个词组啊,consist是个动词前面怎么直接加在be后啊?
consist of 用法 如下
The throwing events consist of javelin,discus,hammer and shot.
投掷项目包括标枪、铁饼、链球和铅球.