求大神找语法错误 只有当你60岁的时候，你回头看自己的人生。你才会意识到你有没有做到最好。而且，只

以下是发现的问题（括号括起来部分）和修改建议（用-->[ ]标注部分）:

Only when you (are 60 years old,and you look back on your life. You'll)-->[look back on your life at the age of sixty will you be] aware of what you could have  done better. (Besides,) -->[And] ony when you (said)-->[are sure that] you have tried your best to do (it,you'll satisfy) -->[everything will you be satisfied] with (your life)-->[the life you have so far been lived].
注:1.以only开头的句子，其主谓要倒装，所以两处you'll都要改成will you；2.aware是形容词，其前面要加be动词；3.这里“而且”应该用and或者furthermore；4.这里“可以说”的意思是“确信”，所以要用sure或absolutely certain；5.最后一句里的it指代不明，应改成everything；6.“对…满意”的英语是be satisfied with sth，不是satisfy with；7.最后的“你的一生”是指到目前为止“你已经过的生活”，所以不能简单用your life，而要用the life you have so far lived或the life you have so far been living(后者更好！)。