(1) since句型：主句用完成时
例：My aunt has worked in a clinic since 1949.
(2) since when +完成时
例：Since when have you planted so many young trees?
从什么时候你种植了这么多小树的?
(3) This/it is the first (third...) time sb have/has done sth
This/it was the first (third...) time sb had done sth
例：This is the first time I have been here.这是我第一次到这儿。
(4) by…(到……为止)到过去某个时候为止用过去完成时，到现在为止
用现在完成时，到将来某个时候为止用将来完成时。
例：She will have finished the book by my next birthday.
到我下一个生日为止，我将完成那本书。
(5) in the past time( two days/years...) +完成时
例：In the past 10 years, there have been great changes in our family life.
在过去的十年里，我们的家庭生活发生了很大的变化。
(6) hardly ... when.... (no sooner ... than)句型用过去完成时
例：Hardly had I reached the school when the bell rang. 我一到学校，铃子就响了。
No sooner had we sat down at the table than the phone rang.
我们刚坐到桌子旁边电话就响了。
(7) 未实现的愿望打算等等用过去完成时
例：I had thought I could pass the final examination but I failed.