A 這種時(shí)態(tài)由would/should+完成式構(gòu)成：

　　肯定式： I would/should have worked

　　you would have worked等

　　否定式： I would not/should not have worked等

　　疑問(wèn)式： would/should I have worked?等

　　否定疑問(wèn)式： should I not have/shouldnt I have worked?

　　would you not have/wouldnt you have worked?

　　B 這種形式用于：

　　(a)條件句中。

　　(b)would和should的特殊用法中。

　　(c)過(guò)去時(shí)中，相當(dāng)于將來(lái)完成時(shí)：

　　I hope he will have finished before we get back.

　　我希望在我們回來(lái)之前他已經(jīng)做完。

　　I hoped he would have finished before we got back.

　　我曾經(jīng)希望在我們回來(lái)之前他已經(jīng)做完。