The It is difficult to learn English [1]

I have no teacher to teach me English, so the only way of learning English is talking with you all on line online,. but However  i  I  [2] have just a little vocabulary, and  i  I  always didn't kown don't know [3] how to constitute a right correct sentence.  Umm,the English is so hard to learn and  i  I'm depressed.

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[1] Names of countries (like China and America), names of languages (like Mandarin and English), and names of people (like Lavendar and Peter), always have upper-case letters.

[2] The pronoun "I" is always an upper-case letter.

[3] Rather than saying "I always don't know how to...", you can say "I never know how to...".

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If you are teaching yourself English, you are doing great!  Even though I made many corrections to your writing, your meaning was always very clear.  I wish my Mandarin was as good as your English. 加油！

The difficulties to of learning English:

I have no teacher to teach me english, so the only way of learning english is talking with you all online. but I have just a little vocabulary, and I always didn't don't kown how to constitute correctly construct a right sentence. Umm, the English is so hard to learn, and I'm depressed.

Hi, Lavender! Don't feel discouraged, because learning a new language is hard for most of us. The biggest help for when I first started learning a new language was talking to Native speakers. I can't stress enough how much this helps! I wish you the best of luck and don't give up! :)