The crossword solutions for the term WHAT YOU USED TO BE are THOU and THEE. These words are both pronouns used in the English language, but they have different meanings. THOU is an archaic pronoun that is used to refer to a single person in the second person singular form. THEE is also an archaic pronoun, but it is used to refer to a single person in the second person singular form, but with more respect or reverence than THOU.