1) How long have you had it?
起了多久了?
2) How long did it last?
持续了多久？
3) How long has it been raining?
雨下多久了？
4) How long ago did he leave?
他走了多久？
5) How long has it lasted?
维持了多久？
6) How long have you known her?
你认识她多久了？
补充资料：持续
延续；继续：持续很长时间｜还将持续｜产量持续增长。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条