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Please look at the following sentences and tell me the difference between them.

  1. If you have met him today, then you must consider yourself lucky.

  2. If you met him today, then you must consider yourself lucky.

Also,

  1. Today, I've seen your friend talking to my neighbour.

  2. Today, I saw your friend talking to my neighbour.

Thank you.

Alan Carmack
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Policewala
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    Please see if this ELL post answers your question: [Is there a simple and clear way to explain the difference between past simple and present perfect?](http://ell.stackexchange.com/questions/42951/is-there-a-simple-and-clear-way-to-explain-the-difference-between-past-simple-an?rq=1) – stangdon May 06 '16 at 17:06
  • You should explain why you want to use present perfect in your examples. In short examples without context, there may not be enough information to decide. – user3169 May 06 '16 at 21:43

1 Answers1

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When using the present perfect, basically we're implying that the day is not over yet. So you could see someone talking in the morning, noon or night.

However, when using the past simple we imply that some period of the day ended, namely:

Today, I saw your friend talking to my neighbour.
(Earlier this morning, for example.)

Schwale
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