Jim has been in the factory for two years _______ he left school.A.when B.
问题描述:
Jim has been in the factory for two years _______ he left school.A.when B.
答
since能解释的详细点吗,其他答案为什么不可以?根据has been ,现在完成时态后面的时间状语往往是since+时间点或者for+时间段这里是时间点