YOU SAID:

this is the prettiest cat i´ve ever seen, can i borrow it please?

INTO JAPANESE

これは私が今まで見た中で最も美しい猫です、貸してもらえますか？

BACK INTO ENGLISH

This is the most beautiful cat I have ever seen, can I borrow it?

INTO JAPANESE

これは私が今まで見た中で最も美しい猫です、貸してもいいですか？

BACK INTO ENGLISH

This is the most beautiful cat I have ever seen, can I borrow it?