学习中文的困难 The Difficulty of Learning Chinese

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I was born in America and stayed there for four years. But after I celebrate my four years old birthday, my parents decide to go back to China. Going back to China, I meet many difficulties. The biggest difficulty for me is to learn Chinese. Oh, god, it is so hard. There are so many Chinese and every word has many meanings. What’s worse, the same pinyin may have various meanings and intonation Also makes great difference. I don’t know how to open my mouth. Although there are many people help me, I still feel it difficult to learn well. 
我出世在美国并且呆了四年。但在庆祝完我四岁生日后，我父母决定回到中国。回到中国，我遇到了很多困难。对我来说最大的困难就是学习中文。哦，上帝，太难了。汉字实在太多了，而且每个字又有很多意思。更严重的是，同一个拼音还可以有不同的意思而且音调不一样，差别也很大。我都不知道如何开口了。虽然有很多人帮我，但我还是觉得很难学好。