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I have seen some texts where it is used "exist" on affirmative sentences.

I knew that for affirmative sentences with he/she/it, it must be used S at the end of the verb.


For example, a sentence that I saw in an article:

The application needs to exist.

  • Is this sentence correct? "needs to exists" would be incorrect?
  • Wouldn't be correct exists, since that the person here is the application (it)?
  • If it is not correct, can someone point a source which explains the concept?
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    I'm not sure I understand your question: "Wouldn't be correct exists.. ?" Are you asking if exists is correct ? "The application needs to exist." is correct because as you say "for affirmative sentences with he/she/it, there must be an S at the end of the verb." – None May 8 '17 at 17:05
  • Hi, Laure. I made and edition on the question. I believe that now is clearer. Thank you! – ivanleoncz May 8 '17 at 17:09
15

Your choices are

The application needs to exist in the codebase.

where to exist is an infinitive phrase, or

The application exists in the codebase.

where exists is the verb.

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4

Whether you put an s or es on the end of a verb depends on its subject and nothing else.

If a present tense verb's subject is a singular third person subject (he, she, it, etc.), s or es is used.

Any other situation, no s or es is added. This includes the infinitive to + {verb}.

Exception is to be (use is) and to have (use has).

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