英语翻译1.虽然他会尝试去做,但他必败无疑.2.设想虽然好,但执行起来很难如愿.3.虽然母亲已经70多岁了,可身子骨还挺

1 Hard as he would try,he is certain to fail.
2 Good as the purpose is,it's hardly practicable.
3 70 years old as mother is,she is healthy.
4 Friends for many years as they were,they ended up enemies.
5 18 years old as she is,she behaves very immaturely.