“用完了”的英语可以翻译为：un out of，use up...

情况越来越糟糕，贮备物资也快用完了。Conditions are getting worse and supplies are running out.当时我们呼吸非常急促，很快就要把空气用完了。We were breathing really fast, and using the air up quickly.现在，这架飞机的燃料快用完了。By now the plane was running out of fuel....

每次用完洗发剂后都要用清水将头发冲洗几次。After shampooing, always rinse the hair several times in clear water.到这时,他的存款已全部用完.By this time he had used up all his savings.他已用完最后一滴油.He has used up the last ounce of oil....

“用完”的英语可以翻译为：finish，run out，use up，[经] exhaust，go through ...