"I can’t believe he did that - I’ve never seen______ bad behavior!"

If there are two choices: "such" and "such a," which one is correct?

I personally think both are correct but have slightly different meaning which I couldn't figure out.

2 Answers 2


I can’t believe he did that - I’ve never seen such bad behavior!

Here you don't use an article because you are using behaviour in its uncountable sense – referring to his behaviour in general.

You would use an article if you are referring to a specific behaviour:

The gorilla adopted a dominant stance. This was a behaviour I had not seen before.

  • I'm nodding in front of my screen. Thank you for your help
    – Nguyen M
    Oct 23, 2015 at 11:54

behaviour is uncountable. You should not put 'a' before uncountable noun.

  • 1
    Thanks but I did some quick search and found that it could be either countable and uncountable :( Even the exact phrase "such a bad behavior" is usually found in Google results.
    – Nguyen M
    Oct 23, 2015 at 9:43
  • 1
    @NguyenM I think both are correct. Such bad behavior is also correct.
    – Usernew
    Oct 23, 2015 at 9:45
  • Such bad thing is different from Such a bad thing. Oct 23, 2015 at 9:46
  • @Usernew with no difference at all?
    – Nguyen M
    Oct 23, 2015 at 9:47
  • @NguyenM Zero results for "such a bad behavior" on Google Ngram. It shows "such bad behavior" to be more common. However, Google search results favors the opposite!
    – Usernew
    Oct 23, 2015 at 9:51

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