书上说since不与瞬间动词连用,那it's 2 years since he left his hometown为什么对?
问题描述：
书上说since不与瞬间动词连用,那it's 2 years since he left his hometown为什么对?
答
原句转换成he has left his hometown since two years before .
这是现在完成时．现在完成时无瞬间动词．