Social networking websites have had a profound impact on individuals

mrmvp

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Jul 13, 2017
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Is there a difference in meaning between "have" and "have had" on the following sentences?

1.Social networking websites have had a profound impact on individuals.
2.Social networking websites have a profound impact on individuals.
 
Yes. the first talks about the impact from some time in the past until the present.
The second talks about the impact in the present.
 
Is there a difference in meaning between "have" and "have had" on in the following sentences?

1. Social networking websites have had a profound impact on individuals.
2. Social networking websites have a profound impact on individuals.
Please remember to put a space after the full stop when numbering a list of sentences.
 
The present perfect "have had" talks about a time range (started in the past and continues up to, and possibly including, the present). Look at the orange arrow.
present perfect 2.jpg
The present simple "have" just states a current truth/fact.
 
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