1.過去完成式的形式是had+過去分詞。

2.過去完成式表示過去某一時間或某一動作之前已經(jīng)完成的動作或存在的狀態(tài),這一過去的時間可由by,before引導(dǎo)的時間副詞片語或子句或從上下文中表示出來。

So I had finished ironed your shirt before you got up.

所以我在你起床前就熨好了你的襯衫。

I had finished typing before lunch.

我在午飯前已打完字。

3.過去完成式表示過去某一時間以前開始一直延續(xù)到那個時間并可能繼續(xù)下去的動作或狀態(tài),常和by或since引導(dǎo)的表示時間的片語或子句連用。

You had done housework for 2 months when I heard your complaints.

到我聽到你的抱怨時止，你已經(jīng)做了兩個月家務(wù)了。

He had studied English for five years when he took the exam.

到考試時止,他已經(jīng)學(xué)了五年英語。

4.過去完成式可表示過去未實現(xiàn)的希望或計劃。

I had hoped that you became an industrious man.

我曾希望你成為一個勤勞的男人。

I had hoped to pass examination.

我曾希望能通過考試。

5.過去完成式表示在過去某時或某個動作之前發(fā)生的動作、存在的狀態(tài)或表示經(jīng)歷、經(jīng)驗。

I said I had been angry for your laziness since we married

我說自從我們結(jié)婚以來我一直為你的懶惰生氣。

He said that he had been very busy since we last met.

他說自從我們上次會面以來他一直很忙。