You use prospective to describe someone who wants to be the thing mentioned or who is likely to be the thing mentioned.
would-be , future
The story should act as a warning to other prospective buyers.
这篇报道应该可以对其他可能的购买者起到警告作用。
his prospective employers.
可能会聘请他的雇主们。
You use prospective to describe something that is likely to happen soon.
anticipated
The terms of the prospective deal are most clearly spelled out in Business Week.
《商业周刊》上清楚地说明了这笔即将达成的交易的条款。
prospective economic growth.
预期经济增长。