had worked是什么时态,done是什么形式

had worked是什么时态,done是什么形式

had been done是什么时态s “had been done”表示过去的过去，是过去完成的被动态时。如：The rooms had been cleaned when I came. 我来的时候，房间已经被打扫了。have/has be“have had”即“have done”，表示现在完成时，had是have的过去分词形式，这里只不过刚好那个done又是have而已。例句：So far I have had no luck with finding a

由于本句有时间状语for some time,表示谓语动作延续，谓语不能用现在进行时，必须用和完成时有关的时态。有些考生误选了C) leaked或A) had leaked。是因为他们没A. had worked B. had been working C. will have worked D. would have worked 5. Not until then did people know that he ___ important military informa

done代表什么时态done是完成时态。done是do的过去分词形式，一般在完成时态和被动语态中使用。现在完成时态：have(has)been done。过去完成时态：had been done。例句：I'm taken to shad been Iat the bus stopa bus finally came. 当车来的时候，我在车站已等了20分钟。had worked He said hein that factory1949. 他说自从1949年以来他就在

ˋ▂ˊ 3、完成时（1）过去完成时had worked He had worked ten hours when you came in.你进来时他已经干了10个小时了。（2）现在完成时have/has worked He has never worked so late 建议你看看英语时态的结构.一共16种时态.各自表达不同时间概念.1.By the time he retires,my father___for almost forty years.A.has been working B.has worked C.will be w

●▽● had worked shall/will have worked should/would have worked 完成进行have/has been working had been working shall/will have been working should/would have been wor2. 过去完成时态如何正确使用动词时态_学习方法网完成be/work过去完成时态had worked一般过去将来时态would work xuexifangfa|基于8个网页3. 过去完成