很久的时间
a very long time
很久以前的事
something that happened a long time ago
这事发生在很久以前。
This happened a long time ago.
他很久没有来了。
He hasn't been here for a long time.
很久没有消息。
There hasn't been any news for a long time.
不要很久
do not need a long time
久而自明
become evident after a long time
坐得过久
sat for too long
工作得太久
working too long
怎么这样久还没有办完？
How can it be like this for so long and still not done?
我久有此意。
I've had this idea for a long time.
她汉语学了好久了。
She's been studying Chinese for ages.