Hello there Rose,

Thank you for submitting your homework. I was very glad to know these thing about you. Here are my corrections please check and take note of them.. thank you..

My first hobby is play instrument.(like piano, guiter, flute) becuase I play the instrument, I feel happy and exciting.

Correct: I have two hobbies. My first hobby is playing a musical instrument like piano, guitar or flute; because when I play an instrument, I feel happy and excited.

**Be careful in spelling words. Before you start enumerating, write a sentence first that will say something about what you are about to enumerate. When you are writing an action or hobby that you like doing, you can use the gerund form of the verb (verb + ing). You do not have to put parentheses to separate the examples, but write them in one sentence instead. 'Because' is a conjunction that is used to combine two independent clauses into one. 'An' is better determiner for the noun 'instrument' because there is no specific instrument mentioned. 'Exciting' is an adjective which is used to say that something makes you feel excited, while 'excited' is how someone feels when she feels the excitement. 

So I play the instrument everyday, every free time.

Correct: So, I play an instrument everyday, whenever I have a free time.

** 'An' is better determiner for the noun 'instrument' because there is no specific instrument mentioned. 'whenever I have a' is better to use than 'every', to say something that you have in an indefinite time.

Secound hobby is play with my dog.

Correct: My second hobby is playing with my dog.

**Be careful in spelling words. Use possessive pronoun 'my' to say that it is your second hobby. Use the gerund form of the verb, which acts as a noun.

My dog is boy, and he's name is 'Poby'

Correct: My dog is a boy. His name is Poby.

** Use the determiner 'an' for the noun boy. 'His' is the possessive pronoun to indicate a boy's ownership.

 I think it's very nice and cute name.

Correct: I think it's a very nice and cute name.

**Use the determiner 'an' for the noun name.

I throw he's toy, and he bring it me.

Correct: I throw him a toy, then he brings it back to me.

**'Him' is the pronoun for a boy which acts as the recipient of the action. Use the determiner 'an' for the noun toy. Then, is a conjunction expressing another action after the preceding one.

** Since 'he' is a singular subject, it requires a singular verb 'brings'. Also, use the preposition 'to' to indicate the direction of the action.

We have funny time together always.

Correct: We have funny time together always.

**Fun is different from funny. If you wanted to say something that makes you smile or laugh, like comedy, then the proper word is 'funny'; but if you wanted to say something that gives you enjoyment or pleasure, then the proper word is 'fun'.