As a whole our efforts did not prove to be futile. 總體說來，我們的努力沒有白費。
Perhaps this book will prove to be of some use to you in your studies. 也許這本書會對你的研究有用處。
His gloomy prognostications proved to be false. 他那悲觀的預測已證明是錯誤的。
She may very well prove to be on the up and up, but it pays to be careful. This burg is full of gold diggers, you know. 她這個人可能是很正直的，但是以小心謹慎為妙。你要知道，這個城裡到處是以色相誘騙男人錢財的女子啊。
In very gradual, complex ways, Britain may prove to be, not the Trojan horse of American influence which France has always feared, but, on the contrary, a counterpoise to the American tide. 雖然過程緩慢，方式也很複雜，可英國也許能夠證明他們並非是法國總是害怕的那種美國勢力的潛在危險。恰恰相反，他們是與美國潮流抗衡的力量。
