then /ðen/ I. adv. 1. 那时(指过去)，到那时候(指将来)：I was in school then.当时我在上学。2.然后，其次：First comes spring, then summer. 先春天后夏天。 3.那么(常用于句首或句尾)： Then let’s begin.那么，咱们就开始吧。Do as you think fit, then.那么你就看着办吧。 4. 用于习语 then and there/there and then立即：I suggested he phone his mother and he did it there and then.我建议他给他妈打电话，他立即就打。 ‖II. n. 那时： by then 到那时；from then on 从那以后；since then 从那以来；till then 到那时为止