过去时与过去完成时辨析
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课件10张PPT。The Difference of Past Simple & Past Perfect过去时与过去完成时辨析SophiaDefinitions about Past Simple & Past Perfect and their forms Use the Past Simple when an action or situation in the past is finished or something happened in the past.
Form: didDefinitions about Past Simple and Past Perfect and their formsUse the Past Perfect to talk about events or situations in the past which happened before other past events.
Form: had done
Giving examples: Past Simple1.Helen Keller was a very special girl who needed a superb teacher.
2.Anne was brought in to help Helen.
3.One day, Ann took Helen out to the well.
4.Then suddenly, Helen had a burst of understanding.
5.We went to shopping yesterday.
6.Later, the police found the lost boy.Giving examples: Past Perfect1. This particularly sad event left a deep impression on Pliny who had lost an uncle in the eruption.
2. However, more than 1,600 years later, some scientists found the lost towns that had been buried under the ashes.
3. The police arrested the man who had broken into a jeweler shop.The Comparison of Past Simple and Past Perfect 1. Around the end of the first century AD, a Roman writer called Pliny wrote about a terrible volcanic eruption that he had witnessed as a young man.
2. Pliny described a cloud coming down the mountain, blocking out the sun and burying everything in its path.
3. I first met her at a party. I had never seen her before.
4. Why did you leave the exam early?
Because I had finished.
5. I was frightened as I sat in the driver’s seat of the car. I had never driven before. The related exercises: Use the proper forms to fill in the blankets. 1. The play _____________ (start) when I got to the theater. And most people were seated well.
2. Last month, two policemen in Arizona, USA _________ (take )fifteen-year-old Ann to the police station. had startedtookThe related exercises: Use the proper forms to fill in the blankets
3. She __________ (be) out with her friends in the park last night.
4. I ____________ (live) in London for ten years before I moved to Paris.
5. When I was ten, I __________ (save) my brother’s life! washad livedsavedThe related exercises: Use the proper forms to fill in the blankets6. By the time I got home, my brother _____________ (leave).
7. I immediately ___________ (dive) in after him because my brother couldn’t swim!
8. He believed that he __________ (do) the right thing.
had leftdived
had doneConclusions:Time Phrases:
过去时典型时间状语：yesterday, last week, an hour ago, the other day, in 1982, just now等
过去完成时典型时间状语：before, by+过去的时间, until, when, after, once等
Form: didDefinitions about Past Simple and Past Perfect and their formsUse the Past Perfect to talk about events or situations in the past which happened before other past events.
Form: had done
Giving examples: Past Simple1.Helen Keller was a very special girl who needed a superb teacher.
2.Anne was brought in to help Helen.
3.One day, Ann took Helen out to the well.
4.Then suddenly, Helen had a burst of understanding.
5.We went to shopping yesterday.
6.Later, the police found the lost boy.Giving examples: Past Perfect1. This particularly sad event left a deep impression on Pliny who had lost an uncle in the eruption.
2. However, more than 1,600 years later, some scientists found the lost towns that had been buried under the ashes.
3. The police arrested the man who had broken into a jeweler shop.The Comparison of Past Simple and Past Perfect 1. Around the end of the first century AD, a Roman writer called Pliny wrote about a terrible volcanic eruption that he had witnessed as a young man.
2. Pliny described a cloud coming down the mountain, blocking out the sun and burying everything in its path.
3. I first met her at a party. I had never seen her before.
4. Why did you leave the exam early?
Because I had finished.
5. I was frightened as I sat in the driver’s seat of the car. I had never driven before. The related exercises: Use the proper forms to fill in the blankets. 1. The play _____________ (start) when I got to the theater. And most people were seated well.
2. Last month, two policemen in Arizona, USA _________ (take )fifteen-year-old Ann to the police station. had startedtookThe related exercises: Use the proper forms to fill in the blankets
3. She __________ (be) out with her friends in the park last night.
4. I ____________ (live) in London for ten years before I moved to Paris.
5. When I was ten, I __________ (save) my brother’s life! washad livedsavedThe related exercises: Use the proper forms to fill in the blankets6. By the time I got home, my brother _____________ (leave).
7. I immediately ___________ (dive) in after him because my brother couldn’t swim!
8. He believed that he __________ (do) the right thing.
had leftdived
had doneConclusions:Time Phrases:
过去时典型时间状语：yesterday, last week, an hour ago, the other day, in 1982, just now等
过去完成时典型时间状语：before, by+过去的时间, until, when, after, once等