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Anonymous Posted 12 years ago
Grammar

In or at?

Hello. Could someone please tell me which sentence is correct?

She is really good at what she does.

She is really good in what she does.
  

Top answer

The usual expression uses "at".

  • The usual expression uses "at".
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6 Answers
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The usual expression uses "at".
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When you say the usual expression uses at, does that mean it is not incorrect, so is I am not good in English, please?
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The only expression that I can think of that uses "in" is "I'm good in bed".
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Odessa DawnWhen you say the usual expression uses at, does that mean it is not incorrect, so is I am not good in English, please?
For me, "good in ..." is not very natural. However, if you search Google Books, for example, you will find examples of this pattern from competent native writers.
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jon8 The only expression that I can think of that uses "in" is "I'm good in bed".
I would say that "good in bed" is slightly different because "in bed" has a literal meaning. In other words, "bed" is not a subject or endeavour or activity.
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So both in or at can be used?

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