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grammar - Correct usage for "all you need is/are..."



What is the correct verb tense for the phrase "all you need is", when what follows is a plural?



  • All you need is paintbrushes and paint.

  • All you need are paintbrushes and paint.


Or is neither incorrect? Both forms sound funny to me.


Google shows an order of magnitude more hits for "all you need is two" than "all you need are two", but the latter still has ~500K hits, so it seems that both forms are in common use. (You can also examples of both usages in Google's "News" search.)




Consider a related example:



  • All is good.

  • All are good.


Both forms are correct, but have slightly different meanings/contexts. The first is correct if "all" refers to "everything" (singular); the second is correct if "all" refers to an implied concrete set of things, as in "all (the widgets) are good". This line of reasoning seems to imply the latter form is correct, since "paintbrushes" are concrete things. (And yet that seems to be the less popular form in common usage, judging by Google hits).



Answer



I think the choice is driven by semantics. It depends on whether the object of the sentence is "seen" by the subject as a single concept or not.



  • All I need is cigarettes and alcohol.


        ...if you're thinking of their desired effects on your body, but...



  • All I need are cigarettes and alcohol.


        ...if you're making a shopping list.



  • All you need is paintbrushes and paint.


        ...to begin your artistic career, but...



  • All you need are paintbrushes and paint.


        ...because you already have an easel.



  • All you need is friends.


        ...some random collection of them, that is, but...



  • All you need are friends.


        ...each of them unique.


Finally,



  • All you need is love.


        ...never are, but some may think they need more. :)


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