his ambition to become an teacher deserves our support.中to become an teacher在句子做什么成分?为什么不是同位语?whether……or（not）的省略形式是be+主
问题描述：
his ambition to become an teacher deserves our support.中to become an teacher在句子做什么成分?为什么不是同位语?whether……or（not）的省略形式是be+主语+or,那么,whether那个句中的be动词,只能用be,还是说is,was之类的都可以?
答
首先是to become a teacher 是做ambition的定语修饰ambition ,如果是同位语那么ambition和tobecome a teacher 应该是同一概念,可以任意省略其一,这里不是whether 那个我听不懂你的意思，能不能给我句句子或者题目be they gases,liquid or solid等于whether they are gases,liquid or solid还是whether they be solid,liquid or solidare