Sorry to hear the bad news too but you are THE REASON why the Chinese civilization had endured to this day.  Do you know that Chinese is the only ancient race that survived till today?  All her contemporaries such as the Romans, Greeks & Egyptions of the past along with their languages and cultures are all gone  This is because we sacrifice ourselves for the good of future generations or for the family so that in the end, we all can excel.  You are very noble.  My hat off to you!  Don't worry, your English skills will continue to improve here.  Here you learn things about English, your sister cannot learn in the classroom!  I hate to say, you have already found a good teacher - me!  If you follow my advice and my teachings you will be great and even better than your sister.

Some Bad News

What I heard tonight was very bad news for me.  Because of the bad news , I have to no choice who but to leave my studies and work hard so that my sister can have an opportunity to study English.  continue to study English in college between my sister and me.The idea of my sister and mother is me.Actually I will go on, but I feel that unfair to my sister.It's a opportunity to my sister to learn the skills how to study English well ! I feel so sorry that I will work hard in the furture and earn more money to suggest my sister to go to school!  Actually the idea comes from my mother and me.  I felt that it would be selfish of me if I do not not help my sister.  Though I feel sad for myself, I have to sacrifice and work hard.

Use short and simple sentences to express your English.  When you are more comfortable with them, then use longer ones.  Don't worry I will be here to help you :)