YOU SAID:

You should put your guitar on it.

INTO JAPANESE

ギターを置いてください。

BACK INTO ENGLISH

Please put the guitar.

INTO JAPANESE

ギターを入れてください。

BACK INTO ENGLISH

Please put in the guitar.

INTO JAPANESE

ギターに入れてください。

BACK INTO ENGLISH

Please put it in the guitar.

INTO JAPANESE

ギターに入れてください。

BACK INTO ENGLISH

Please put it in the guitar.