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Present Perfect

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by

Maggie Teng

on 16 February 2013

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Transcript of Present Perfect

Present Perfect When do we use it? How do we use it? I have read this book for an hour. I have been reading this book for an hour. Finally... We all know that it related to the past, right? But how? Past simple is also related to the past. What's the difference? Why should a tense related to past called PRESENT perfect? For example: I have read this book for an hour. Present We stand at the time point "Present" to Perfect To see what exactly? We talk about something in the past To see how it effect Now!!! Present OK, so now we know the difference between the Present Perfect and the Past Simple Subject + have/has haven't/hasn't + Past Participle + Object + Adverbial of Time Can we find Why any exact time point when the act happened in this sentence? Remember, what we interested is the connection between the past and present, we don't care about when the act happened. I have read this book for an hour. present past future present past future Let's see 3 different ways to show the period of time in the past 1 3 2 So... Since + Amount of Time For example: I have lived here since 1998. People here have had this tradition for thousands of years. Things started in the past and last till now (I lived here from 1998, and I'm still live here now) (People here have this tradition from thousands of years ago, and still have it now) For + the time the action started things you experienced Unspecific expression of Time like yet/before/just/lately... I have just eaten sushi been to Thailand written a poem ridden a camel before lately For example: Repeated past actions at unspecific time Adverbial of frequency like often/sometimes/ever/twice... not yet For example I have practiced the speech twice. Have you ever been to Beijing? Complete alredy in the past look at the things we did in the past. It means that I read this book an hour ago, and maybe will continue reading it. It means that I read this book an hour ago, and will continue reading it. It seems that they have the same meaning... So what's the difference? Like we said, present perfect focused on the connection between the past and the present, so if I said that "I have read this book for an hour." It means that "I am..." tied? My state right now On the other hand, present perfect progressive focuses on the period of time the action takes, so if I said "I have been reading this book for an hour." I want to emphasize the duration, and maybe I will add "so I couldn't been at the crime scene at that time". Lets do some practice
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