Question

after she ( ) at the hospital for two years,she

after she ( ) at the hospital for two years,she decided to quit the job。
空格处填had worked，had been working对不对？

Answer 1

首先，正确答案毫无疑问是 had worked .
其次，had been working 在这里不能用。因为，这是【过去完成进行时】，表达在过去某一时间或动作之前已经完成/发生，但还可能继续下去的动作或状态。
但是，这个句子后面明确有 decided to quit the job【决定放弃这工作】，说明不再有动作或状态延续。因此，不能用过去完成进行时态。

Answer 2

答：空白处应该填had worked. 因为表示过去的过去意义，故用过去完成时。

追问

为啥不能用过去完成进行时呢？

Answer 3

Worked