Question

If he_____hard in the past five years,things wouldn't be going so smoothly A.had not been working

B.was not working C.has not been working D.were not working
这道题选A，我选了B,为什么选A，选其他的为什么不对呢

Answer 1

先判断这是虚拟语气。
有过去的时间：过去的五年里。---所以是与过去事实相反的，所以虚拟语气的句式：if 主语+ had 过去分词...........主语 +should/would +have+ 过去分词。