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Anonymous Posted 11 years ago
Grammar

Past perfect and present perfect

Hi, I have a hard time understanding how to use the above two in my sentences.
E.g. Has already or had already.

To me, past perfect when we want to refer to a past that is earlier than another time in the narrative like John had breakfast before we got up.

But after googling, I found below two sentences explaining present perfect.

“for something that happened in the past but is important at the time of speaking”
“We often use the Present Perfect to talk about change that has happened over a period of time.”

I can’t grasp totally above two sentences.
Can someone please explain?
  

Top answer

Anonymous “for something that happened in the past but is important at the time of speaking” For example: I've forgotten my keys (so now I can't get into my house). ” For example: Fuel prices have increased recently. On this diet I have lost 16 pounds in three months.

  • Anonymous “for something that happened in the past but is important at the time of speaking” For example: I've forgotten my keys (so now I can't get into my house).
  • ” For example: Fuel prices have increased recently.
  • On this diet I have lost 16 pounds in three months.
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1 Answers
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Anonymous“for something that happened in the past but is important at the time of speaking”
For example:

I've forgotten my keys (so now I can't get into my house).
The mice have eaten all the cheese (so now there is no cheese left)
Anonymous“We often use the Present Perfect to talk about change that has happene

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