请英语高手进来翻译一句话

I'm really trying my best to change myself, you cann't know you will despond or not, if you didn't give me a chance.

我真的才努力改变自己，如果你不给我机会，你怎么知道你会失望呢？

英文吗? 那简单~

I ``am ` really` serious``` in` changing, if you do not give me the opportunity, how do you know that you will disappointed?

这个

I am really serious in changing, if you do not give me the opportunity, how do you know that you will disappointed?

我又整理边..

I am trying my best to correct. How do you sure to be disappointed again if you even don't give me a chance.

I am realy changing myself now!But if you do not give me some opptunities,how you know you'll be disappoint with me?

真的很认真的在改变，如果你不给我机会，你怎么知道你会失望呢？”
it's true that i'm really determined to change, if you don't give me the chance, how could you know you will be disappointe?

I'm trying my best to change, but how could you know I'll let you down