You are right

Many years ago，my brother told me，you should must hard study english hard.As the economy decelop quikly all over the world，english is very impotence  important in the job.If you want to work in foreign company，so you should to do hard，I knew what he say  said is right，but my english is not very well now i realize that it is necessary skills in finding  job，My sister also told me ，you should learn as so as possible，now you are young ，have youth，if you have no survival skills what are you to do when you older，So i need to hard study from now ，i hope it's not too late。
Please help me modify
.

You are right

Many years ago, my brother told me "You should study english more.  As the economy developes quicker all over the world, english becomes very important in the job. If you want to work in a foreign company  you should (work/study) harder;" I knew what he said is right. But, my english is not very good and I now  realize that it is a necessary  skill needed to find job. My sister also told me  "you should learn as much as possible while you are young. If you have no survival skills, what are you to do when you are older?" So, I need to study hard from now on; I hope it's not too late!
Please help me modify