YOU SAID:

don't sit down because I've moved your chair to the library

INTO JAPANESE

あなたの椅子を図書室に移動したので座らないでください

BACK INTO ENGLISH

I moved your chair to the library, so please don't sit down.

INTO JAPANESE

あなたの椅子を図書室に移動しましたので、座らないでください。

BACK INTO ENGLISH

I have moved your chair to the library, so please don't sit down.

INTO JAPANESE

あなたの椅子を図書室に移動しましたので、座らないでください。

BACK INTO ENGLISH

I have moved your chair to the library, so please don't sit down.