久[jiǔ] 基本解释：
新英汉大词典：
- 久[jiǔ]
- 形容词- （时间长） for a long time; long:
long ago;很久以前
a long-tested fighter;久经考验的战士
- 名词- （时间的长短） of a specified duration:
for as long as two months;两个月之久
How long have you been a smoker?你抽烟多久了?
以上内容来源于：《新汉英大辞典》
例句与用法：
There was a long lag in forwarding mail to us.
He had been ill for a long time and consequently he was behind in his work.
How long will the discharge of the cargo take?
How long did it last?
How long will it take to get to your house?
How long have you been here?
Long time no see.
久的其他解释: