I want to live in a very big house. There is a ground next to the pond and a swimming pool. Where I can play a lot and run. The best part is to have a great air. If I will live in a house like that, I would be so happy.

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Fiona: I wnte to live like big big house
Correct: I want to live in a very big house
Explanation: It is better to say it this way. Also, be careful of spelling of "want".

Fiona: there is ground on the pond, swimmig pool
Correct: There is a ground next to the pond and a swimming pool.
Explanation: It is better to say it this way. I used next to as preposition to link the nouns in your sentence. Don't forget to put a period after your sentence.

Fiona: then I can play a lots ans run.
Correct: Where I can play a lot and run.
Explanation: Please be careful of spelling.

Fiona: Best is great air!
Correct: The best part is to have a great air.
Explanation: It is better to say it this way. Please study the subject verb agreement.

Fiona: When I live like this hose I wlii so happy.~
Correct: If I will live in a house like that, I would be so happy.
Explanation: You are talking about the possibility it is better to say it this way. Please study conjunctions.

Hi Fiona :)

Thank you for the quick response to do your homework.
Good  job! But please be reminded of my corrections and if you have questions or clarification don't hesitate to ask me. Alright?

Love,
Teacher Jasmine (^_^)