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I don't know which of the following expressions is correct for depicting past version of "think":

  1. I didn't think...
  2. I don't thought...
  3. I didn't thought...
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closed as general reference by aedia λ, Kris, Armen Ծիրունյան, Bill Franke, mplungjan Feb 13 '13 at 8:39

This question is too basic; it can be definitively and permanently answered by a single link to a standard internet reference source designed specifically to find that type of information.If this question can be reworded to fit the rules in the help center, please edit the question.

Conjugation of "not think" – aedia λ Feb 13 '13 at 6:39
@aediaλ Thanks, really useful. – Afshin Mehrabani Feb 13 '13 at 6:41
Anything with did or did not will keep the infinitive version of the verb – mplungjan Feb 13 '13 at 8:41
@mplungjan Aha, I got it. – Afshin Mehrabani Feb 13 '13 at 9:49
Great, It is the single biggest mistake made by all non-native speakers I have heard. – mplungjan Feb 13 '13 at 9:51
up vote 1 down vote accepted

'I didn't think...' is right, for present tense, and past tense is "I had not thought...." This is probably better on English language users: http://ell.stackexchange.com/

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didn't think is past tense. don't think or am not thinking is present and present continuous. had not thought is past perfect. – Jim Feb 13 '13 at 7:17
So you also have I wasn't thinking as a correct answer. As usual, the question which is correct depends on the context. And how about I thought not? – Mr Lister Feb 13 '13 at 7:33

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