verb agreement - Should we write “allow” or ”allows” in “require that the class allow[s]”?



Can you explain to me whether I should or should not use ‑s at the end of the verb allow in this sentence?



This function requires that the container class allow[s] random access



The sentence in the book I read wrote allow without ‑s. However, the container class is a third-person singular, so the ‑s must be required. Is that right?



Answer



This is an example of the subjunctive:



The Subjunctive is used to emphasize urgency or importance. It is used after certain expressions (see below).


Examples:


I suggest that he study.
Is it essential that we be there?
Don recommended that you join the committee.

http://www.englishpage.com/minitutorials/subjunctive.html


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