On Saturday, I will go to the sports center.
On Sunday, I will go to the swimming class.
It is so nice and fun.

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1.
Anna: i will the starday is went to the sport senter
Correct: On Saturday, I will go to the sports center.
Explanation:
*Always begin your sentence with a capital letter and end it with a period.
*Be careful with the correct spelling of the word sports center.

2.
Anna: i will the sunday is went to the swim class
Correct: On Sunday, I will go to the swimming class.
Explanation:
*Always begin your sentence with a capital letter and end it with a period.
*It is swimming class, not swim class.

3.
Anna: is so nice and fun
Correct: It is so nice and fun.
Explanation:
*Always begin your sentence with a capital letter and end it with a period.
*Add a subject in your sentence.

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Hello, Anna! Thank you for submitting your homework. Please read the following corrections and explanations carefully. If you have questions and clarifications, you can ask me in our class. Thank you!