for a long time 的时态搭配
for 介词引导的时间状语常搭配完成时态或过去时态,请帮忙详细解释一下以下各句中的的时态使用的要求.
1.---Did Alan enjoy seeing his old friend yesterday?
--- Yes,he did.He hadn't seen his old friends for a long time.
2.I worked in a foreign trde company for five years.Still,I don't regret having given up the well-paid post.