这一去便是个把月
“for about a month.”
THE DIALOGUE REEL
对了 正巧呢 你这次去南京
“Right. Just so happens you're going to Nanjing”
这一去 便是 个把月
“for about a month.”
如果你到了那儿呢 要是把这个什么
“If you get there and forget all about”
Direct spoken expression in this communicative setting.
Using 'geba' (个把) before time measure words is a classic spoken convention in northern and standard Mandarin to express vague approximations.
LEARNING CHUNKS & PARTICLES
about a month
A colloquial quantifier construction meaning 'around one month', similar to '个把星期' (around a week).
once going, it will immediately mean...
Used to introduce the immediate outcome or commitment involved in embarking on an action.