5.  過去完成時與一般過去時

　　1) 基本區別：過去完成時表示以過去某時間為起點以前所發生的動作或存在的狀態，即過去完成時強調“過去的過去”，而一般過去時只表示以現在時間為起點以前所發生的事情或存在的狀態。如：

　　He studied there two years ago.他兩年前在那兒學習（離現在兩年）

　　He said he had studied there two years before.他說他兩年前在那兒學習過。（離他說話時兩年）

　　2) 特別注意：兩個動作如果按順序發生，又不強調先后，或者用then, and, but等連詞連接時，多用一般過去時。如：

　　When she saw the mouse, she screamed.

　　My aunt gave me a hat and I lost it.

　　8

　　過去將來時

　　標志：would + 動詞原形

　　1. 表示從過去某一時間來看將要發生的動作或存在的狀態，一般用于主句為過去時的賓語從句中。如：

　　He said he would come here next Friday.

　　I knew that he would help us when we were in trouble.

　　2. 表示過去的動作習慣或傾向：

　　The old man would sit on a bench in the quite park for hours without doing anything.

　　When I worked on that farm, I would get up at 5 am.

　　3. 用于虛擬語氣中：

　　If I were you, I would not do that.

　　If he were here, he would show us how to do it.

　　4. 過去將來時的其他形式

　　1)  was / were going to + 動詞原形。如：

　　He told us that he was going to attend the meeting.

　　She said that I was going to be sent to meet her at the railway station.

　　2) was / were to + 動詞原形。如：

　　The building was to be completed next month.

　　Li Lei was to arrive soon.

　　3)  was / were about to + 動詞原形。如：

　　We were about to leave there when it began to rain heavily and suddenly.

　　He was about to have lunch when the bell rang.

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