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Khoshtip Posted 12 years ago
Grammar

3rd person singular s

Hi, I have read this sentence snip some where:
.....let everybody know about that subject ...

Why the verb know here doesn't give the s? Isn't the everybody 3rd person!?
  

Top answer

The main verb of your sentence is let , and it shows the person, number and tense [ here, a command ]. The following verb is in the base form (showing no tense, number or person). Note: Be sure that everyone knows about the subject...

— Philip

  • The main verb of your sentence is let , and it shows the person, number and tense [ here, a command ].
  • The following verb is in the base form (showing no tense, number or person).
  • Note: Be sure that everyone knows about the subject...
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5 Answers
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The main verb of your sentence is let, and it shows the person, number and tense [ here, a command ]. The following verb is in the base form (showing no tense, number or person). Note: Be sure that everyone knows about the subject...
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So I should first find the main verb then decide to add the 3rd person s to it or no, yes?
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khoshtipSo I should first find the main verb then decide to add the 3rd person s to it or no, yes?
Essentially, yes.
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khoshtipWhy doesn’t the verb know here doesn't have the s? Isn't the everybody 3rd person?
Know about that subject is a non-finite clause functioning as complement to the verb let. Everybody is object of let.
PhilipThe main verb of your sentence is let, and
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Aspara GusIf the clause is imperative, then let is a base form just as know is.
This could suggest to some learners that the imperative and the (bare) infinitive are essentially the same. I prefer to say something like We use the base form of the verb for the imperative and infinitive (as well as other things) . Just a personal preference
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