在深入探討英語語法的復雜性時，過去完成時態是一個非常重要的概念。它不僅幫助我們表達過去某個時間點之前已經完成的動作，還能夠描繪出過去事件的先后順序和因果關系。通過例句和語法分析，我們可以更好地理解過去完成時態在不同語境中的應用，從而在實際交流中更加準確地使用這一時態。

　　<例句>

　　I had thought to return early but they wouldn't let me go.

　　我本想早點回來的，但他們不讓我走。

　　<語法分析>

　　在談及由hope, intend, mean以及think等詞所表達的未實現的愿望時，可以用過去完成時態，這是該時態的常見用法。所為過去完成時態就是過去時與完成時的結合，它表示在過去的某個時期或時刻之前已經完成的動作或存在的狀態，動作或狀態的時間一直延伸到過去某個時刻。

　　<觸類旁通>

　　(1) When I arrived she had just left.

　　我到達的時候，她剛剛離開。

　　語法分析：過去完成時表示過去某時前某事已經發生，可以說是過去的過去。

　　(2) I heard that he made an important discovery.

　　我聽說他有了一個重要的發現。

　　語法分析：過去完成時常用在賓語從句中，尤其用在間接引語中。

　　(3) As soon as she had done it, she knew it was a mistake.

　　她剛一動手就知道做錯了。

　　語法分析：在狀語從句中，也用過去完成時。

　　(4) I had intended to come over to see you, but was prevented from doing so.

　　我原打算過來看你，但受阻未來成。

　　語法分析：有些詞如hope, plan, mean, expect, intend, suppose, want以及think等有時用過去完成時表示一個本來打算做而未做，曾經設想而未實現的事。

　　(5) He got here before I had got up.

　　我還未起床，他就來了。

　　語法分析：before之后可用過去完成時，表示一個過去未完成或未能來得及完成的動作，這個動作發生的時間遲于主句動作發生的時間。

　　(6) We would get into trouble as soon as the gas had run out.

　　汽油一用完，我們就會陷入困境。

　　語法分析：在時間和條件狀語從句中，過去完成時可大體過去將來完成時。

　　<鞏固練習>

　　(1) She told me that she ______[break] her glasses yesterday.

　　(2) The bell rang before I ______[complete] my paper.

　　(3) I _____[think] that he had died at least two years ago.

　　(4) I _____[hope] to enter a university, but didn't.

　　(5) The concert was more successful than she _____[think].

　　(6) She wore the necklace her mother _____[leave] her.

　　(7) When he _____[sing] his song he sat down.

　　(8) She told me that she _____[know] me since she was a child.

　　<參考答案>

　　(1) had broken (2) had completed (3) has thought (4) had hoped (5) had thought (6) had left (7) had sung (8) had known