used to do

过去常常做某事

urge sb. on, urged, urgency, urgent, urgently, uric, urinal, urinary, urinate, urine, urn, us, USA, usable, USAF, usage, use, use up, used, used to, useful, usefully, usefulness, useless, uselessly, uselessness, user, user-friendly, usher, usherette, USN, USS, USSR, usual, usually, usurer, usurp, usurpation, usurper, usury,