Tom used to be really quiet[改为否定句

Tom didn't used to be quiet,he used to be o____. Tom used to be really quiet[改为否定句 be used for be used to be used from区别 I reall want to hold u tight,treat u right,be with u day and used to be used to be翻译 I used to be used to be to be used used to be to be used to be used be used to be used to used to be be used to used to／be used to／be used for的区别 be used for doing,be used to do,be used as,be used in,be used to doing,used to