When the plurality of an item is unknown, the convention is to put (s) after the item. In

  • It's not clear what you're asking. The subject "item" followed by a conjugation of the verb "to be" would obviously require "is," while "items" would obviously require "are." But you seem to be driving at some use of "item" without an S when it's known to actually be plural, something you need to provide examples of. Sep 9 '19 at 2:46
  • Speak it aloud and write whatever you say.
    – tchrist
    Sep 9 '19 at 2:46

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