I searched each of these "you lack of idea", "you lack idea", "you are lack of idea" & they all come out some results so there must be someone is using them.

But, I do not know which expression is correct!

or are they all correct?

  • Souldn't it be ideas? I'd say "You are lacking ideas" or "You lack ideas". But I think you can't say "of idea"
    – loli
    Aug 4, 2015 at 16:52
  • 3
    None of them are correct. Lack is a transitive verb, not an adjective, so (3) is out. And it doesn't take a preposition before its object, so (1) is out. But idea is a count noun and requires either pluralization or an article, so all three are ungrammatical anyway. If the article were corrected in (2), it would be grammatical. Aug 4, 2015 at 16:53
  • @JohnLawler I'd vote that answer up. Aug 4, 2015 at 16:56
  • 1
    So many people (over 10,000 hits for "you lack of idea") are indeed using it incorrectly. I doubt many of them are native English people though.
    – Avon
    Aug 4, 2015 at 17:05
  • 2
    The first results page says 10,000+ but when I page through them, there are in fact only 28. Aug 4, 2015 at 17:11

1 Answer 1


None of them are correct. Lack can be two things:


In its verb form, it is a transitive verb. This means that is takes an object, you lack something. Using it as a verb in your examples, you could say:

  • You lack an idea.
  • You lack ideas.


As a noun lack means something that you do not have or do not have enough of. You can have a lack of something. Rephrasing your examples, you could say:

  • You have a lack of ideas.
  • You have a lack of an idea.

Note that saying that you are a lack does not make any sense. Someone has a lack of something. However, something can be a lack of something:

His problem is a lack of confidence.

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