my bedroom is a little dirty. And i have two computers in my bedroom.
And we used this room by study room.i have many book shelves in my bedromm

Kevin: my bedroom is a little dirty.
Correct: My bedroom is a little dirty.
Explanation: We should capitalize the first word of every sentence.

Kevin: And I have two computers in my bedroom.
Correct: I have two computers in my bedroom.
Explanation: We don't start a sentence with the word, 'and.'

Kevin: And we used this room by study room.
Correct: We use this room as a study room.
Explanation: You are describing your bedroom, so use the present tense of the verb ('use not used').

Kevin:i have many book shelves in my bedromm
Correct: I have many bookshelves in my bedroom.
Explanation: Capitalize the first letter of the sentence. Bookshelves is one word and be careful with your spelling (bedroom not bedromm).

--------------------------------------------------------------------------------------------
Thank you Kevin for doing your homework!

-Teacher Shane