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As I was studying Peterson’s Master TOEFL Writing Skill, I saw the sentence:

Teamwork requires that a player pass the ball whoever is in the best position to make the goal.

I wonder why pass does not take an -es suffix in the sentence cited above. Is it a mistake? If not, could you please explain under which particular circumstances we don’t add -es suffix to a present tense verb that’s in the third-person singular?

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marked as duplicate by tchrist, Peter Shor , StoneyB, MετάEd, RegDwigнt Mar 31 '13 at 17:25

This question was marked as an exact duplicate of an existing question.

I think it's not much related. – haitaka Mar 31 '13 at 13:05
This has been addressed in several questions here, perhaps best in this one. It's traditionally called the mandative subjunctive, implying that a tense called the 'present subjunctive' is in play in clauses expressing an action commanded or required; but many contemporary theorists prefer to see the verb form as a bare infinitive. The use was at one time common; it still is common in US English, and is experiencing a resurgence in British English. – StoneyB Mar 31 '13 at 13:05
@StoneyB Thank you for your answer. – haitaka Mar 31 '13 at 13:16
@StoneyB The problem with your tag is that tag is the answer, not the question. – tchrist Mar 31 '13 at 14:27