新概念三第二篇I've been coming up here night after

问题描述:

新概念三第二篇I've been coming up here night after
新概念三第二篇I've been coming up here night after night for weeks now .中now怎么理解?

就是到现在,迄今为止的意思.
They have been missing for a long time now...
现在他们已失踪很长一段时间了.