YOU SAID:

my sister is an accountant in a big firm, so you better be careful

INTO JAPANESE

私の妹は大企業の会計士なので、注意してください

BACK INTO ENGLISH

Be careful because my sister is a big business accountant

INTO JAPANESE

私の妹は大企業の会計士なので注意してください

BACK INTO ENGLISH

Please note that my sister is a big business accountant

INTO JAPANESE

私の妹は大企業の会計士であることに注意してください

BACK INTO ENGLISH

Please note that my sister is a big business accountant