ten years before he came to our school.
本句中 work 的工作狀態延續了ten years，直到before he came to our school為止。
He ________( be ) ill for weeks when he asked for sick leave.
She told me she always_________( work in the countryside since she graduated from a college.
本句中 work in the countryside的工作狀態自graduated from a college開始，一直延續至she told me的時候。
3.在一段情景連貫的文字中，先發生的事放在後面敘述時，要用過去完成時。
She felt helpless,not knowing what to do. Her husband _________( die ) and left her no money.
她覺得孤立無援，不知所措，她丈夫去世了，沒留給她財產。
在本句中，she felt helpless…發生在過去，而 die 則發生在felt helpless之前。
4.表示過去未實現的希望、計劃、打算或原本的想法時用過去完成時。常用的動詞有think,suppose,hope,want,expect,plan等。
I ____________(think) he had died.
我原以為他已死了。
They _________(want) to catch the first bus,but they didn't get up early enough.
他們本想趕頭班車，但起得不夠早。
5.在賓語從句中，所敘述之事雖發生於主動詞之前，但從句中有一個確定的.表示過去的時間狀語時或敘述的是歷史事實時，從句中時態用一般過去時。
The teacher said that Columbus ________(discover) America in 1492.
老師說哥倫布在1492年發現了美洲。
句中的discovered發生在said之前，但不用過去完成時had discovered。
6.敘述過去發生的一連串的動作或事件用and或but連線時，用一般過去時。
He ________(get) up, ________(dress) himself and then _________(go) downstairs to have breakfast.
他起身穿好衣服，然後就下樓吃早飯。
He ___________(buy) a volleyball but later _____(lose) it.
7.當主動詞與賓語從句中謂語動詞同時發生時，從句謂語動詞用一般過去時或過去進行時。
He said he ________( know )several languages.
他說他懂好幾門外語。
He was not sure what they _________( do ) at that time.
