有多久

• How long we been riding together , charley
  我们在一起有多久了，查里？
• Doctor : how long have you had this problem
  医生：这种情况有多久了？
• - how long have you been here ? - half a year
  -你来了有多久了？ -半年
• How long is this distance of scene
  这一幕距离现在有多久的时间了？
• . . . how long has it been now , since your loss
  你痛失爱子有多久了？
• How long have you been attending night classes
  你上夜校有多久了？
• How long do i have to make a treatment decision
  有多久的时间，我可以做选择或治疗方式的决定
• How long have you been a football fan
  你成为一个足球迷有多久了？
• How long have you been here ? - half a year
  你来了有多久了？ -半年
• Q . how long is my certification valid
  问：我的认证有效期有多久？