be long to do和long to do不同

Maybe he's been around long enough to know that commodity price spikes don't last more than a few years.第一句是三个副词接在一块吗？around long enough？He says he didn't stick around long enough to notice any health benefits.第二句是动词加不定式吗？

Maybe hes been around long enough to know that commodity price spikes dont last more than a few years.第一句是三个副词接在一块吗？around long enough？

【答】没错。around 是副词，long 也是副词，enough 也是副词，修饰long。

注意这类最基本的使用方法：

He is around（副词）. 他在附近。

He didnt stay long（副词） enough（副词）. 他呆的时间没足够长。

He says he didnt stick around long enough to notice any health benefits.

【答】结构：...（谓语动词）long enough to do ...（结果状语）。