haven例句
I
haven't come all this way to bottle out.
我一路走来不是为了在最后关头打退堂鼓。
The police
haven't really done anything for the black community in particular.
警方并未真正特意为黑人群体做什么.
You
haven't lived until you've used their new micro system.
要是没用过他们新的微系统，这辈子就算白活了。