YOU SAID:

I have to go to the park this afternoon because my niece is having a party for her pet toy cat.

INTO JAPANESE

私の姪が彼女のペットのおもちゃの猫のためにパーティーをしているので、私は今日の午後公園に行かなければなりません。

BACK INTO ENGLISH

I have to go to the park this afternoon as my niece is having a party for her pet toy cat.

INTO JAPANESE

私の姪が彼女のペットのおもちゃの猫のためにパーティーをしているので、私は今日の午後公園に行かなければなりません。

BACK INTO ENGLISH

I have to go to the park this afternoon as my niece is having a party for her pet toy cat.