Could you please check these sentences for me? Thank you.

1) I haven't got any pet animals.
In my free time I go out with my friends, I go to the cinema and I play my guitar. I also go swimming once a week.
2) I usually go horse riding (not "do horse riding") at the weekend.
I like music very much.
3) My sister is attending the fourth class (better year) of primary school.
I sometimes meet my friends for a pizza on Saturday evening.
4) My best friend is attending a high school with an emphasis on languages.
I love animals except for spiders.
5) My favorite hobby is reading fantasy and love books (better stories).
I'm quite good at maths. I like solving maths problems.
6) Last year I started snowboarding but I'm not very good at it yet.

1. I don't have any pets. In my free tim,e I go out with my friends. I also go to the cinema, and I play my guitar. Finally, I like to go swimming once a week.

2. I usually go horseback riding on the weekend.
I like music very much.

3. My sister is in her fourth year of primary school.
I sometimes meet my friends for a pizza on Saturday evenings.

4. My best friend is attending a high school with an emphasis on languages.
I love animals except for spiders.

5. My favorite hobby is reading fantasy and love stories.
I'm quite good at maths. I like solving maths problems.

6. Last year, I started snowboarding, but I'm not very good at it yet.

Sure! Here are the corrections for each sentence:

1) I don't have any pet animals. In my free time, I hang out with my friends, go to the cinema, and play my guitar. I also go swimming once a week.

2) I usually go horse riding on the weekends. I really enjoy music.

3) My sister is in the fourth grade of primary school. Sometimes, I meet my friends for pizza on Saturday evenings.

4) My best friend attends a high school that focuses on languages. I love animals, except for spiders.

5) My favorite hobby is reading fantasy and love stories. I'm quite good at maths and enjoy solving math problems.

6) I started snowboarding last year, but I'm still not very good at it yet.

In order to check these sentences, I analyzed the grammar and vocabulary used in each sentence to make sure they convey the intended meaning. It's always a good idea to review your sentences for any errors or improvements to ensure clear communication.