他的努力失败了。用英语怎么说？

他的努力失败了。

His efforts were unsuccessful.

his

pron. (he的所有格)他的，(he的物主代词)他的东西；det. 属于他的，用于名词前，自己的，指某人的，上帝的；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

efforts

n. 努力( effort的名词复数 )，气力，努力的结果，努力（或艰难尝试）的成果；

例句
They talked modestly of their valiant efforts to keep the tanker afloat...
他们说起自己设法使油轮漂浮的英勇之举时非常谦虚。

were

be的过去时复数和第二人称单数形式，有时代替 was,用于条件从句、动词 wish 之后等；

例句
Shops, houses, and vehicles were set ablaze.
店铺、房子和车辆全都陷于火海。

unsuccessful

adj. 不成功的，失败的，碌碌无为；

例句
He has been unsuccessful in his attempt to win a seat on the board of the company.
他始终未能如愿以偿地在公司董事会中谋得一席之地。