Everyone has a lot of dreams .Some people want to be rich.Some people want to be famous.（Some people want to be rich while others want to be famous）.I have a dream,too.When I was a small child（When I was a little kid）,I had a dream that one day I would become a great pianist.I will（would） play the piano in the Musikvereinin Vienna to（去掉to,改成and） make the best music for the whole world.When l was three years old,my parents help me please a teacher（my parents paid a teacher for teaching me playing the piano）.She is very beautiful and kind.She told me how to play the piano and how to make the music sound better.When l learned two months time（After learning about two months）,I thought play the piano very difficult（改成I thought it is very difficult to play the piano）.After learning my arms are very acid（去掉這句,改成 I felt my arms acid ）,but I did not give up.Now,I’m twelve years old.I still want to be a pianist.I did a lot for the dream（加上to be a pianist ）and I spend（改成spent） more than two hours playing the piano every day.It’s very hard,but I insist （加上on practicing ）it（去掉） for nine years.No mill,no meal.Now I（I’m） in the Grade Examination of musical level of current year for nonprofessionals（這句話我沒懂你要表達(dá)什么,所以沒改） and have reached the 9th.grade in the playing of Piano（如果你想表達(dá)的是：我現(xiàn)在已經(jīng)達(dá)到鋼琴九級(jí)的話應(yīng)該這么寫and have reached the qualification for the grade nine in piano-playing）.Piano is a kind of music（這句話你要表達(dá)什么呢?沒懂,但你的表達(dá)方式肯定不對(duì).）.It helps me learn something of （of 改成about）music.Become a piano play is a hard job（Become a piano player is hard）.I will be harder and harder to practice it（I would practice it harder and harder） .I believe I can do it.
你后面寫的有些表達(dá)不清,不能確定你要表達(dá)什么.首先，很感謝您能幫我修改這篇作文。我仔細(xì)地看了您的回答，現(xiàn)在我還有幾個(gè)問題想請(qǐng)教您（由于字?jǐn)?shù)限制我將分多次追問，還望您能理解）：
1、my parents paid a teacher for teaching me playing the piano我想問一下這里為什么用paid；
2、Become a piano player is hard.這里become是否需要換成becoming；抱歉啊，現(xiàn)在才看到你的追問。
1、paid是pay的過去式，你想表達(dá)的是你小時(shí)候父母給你請(qǐng)了一個(gè)老師，所以...
2、become改成becoming。（becoming a pianist是主語(yǔ)，is 動(dòng)詞，）