Used to do sth used to do sth 表示“过去常常做某事”,现在已经不再做了 I used to cook, but I don't have time to cook now. 我以前总做饭,但是现在没时间做了 Tom used to be a couch potato, but he works out everyday now. Tom以前特别宅,但现在每天都健身 Be...