Consider the following statement:

If I were you, I would go to the doctor.

As far as I know, a modal verb or a past tense can be interchangeably adopted to express the subjunctive mood. It seems, however, that most subjunctive sentences commonly prefer to use a modal verb, rather than a past tense. In conclusion, my questions are

  • Is the following sentence grammatically correct?

    If I were you, I went to the doctor.

  • If so, what is the reason most people prefer to use a modal verb?

  • 2
    "If I were you, I went to the doctor" is not grammatical.
    – DyingIsFun
    Jul 26, 2016 at 3:45
  • 1
    @Silenus If that's the case, why was it allowed for the subordinate clause to use a past tense, instead of a modal verb? It seems to me that the two clauses are the same in the sense that they are both in the subjunctive mood.
    – b1sub
    Jul 26, 2016 at 3:50
  • If the main clause uses the past tense, then it can't be subjunctive (counter-factual). The subordinate clause is "if I were you", and (since there is no modal there) it uses the past tense (in a quirky way, using 'were' regardless of person or number) to indicate the subjunctive -- looking sideways at a hypothetical universe that branched off from ours.
    – AmI
    Jan 3, 2018 at 23:33

1 Answer 1


It's important here to distinguish between the preterite form of a verb, and the past tense meaning that is normally associated with the preterite form. The modal preterite use of some English verbs indicates modality, as the OP points out (not past time). For example, in

I wish you went to the doctor more often than you do.


If you went to the doctor tomorrow, I'd drive you.

...use of the preterite form of the verb (went) does not indicate past time.

To answer your question (why you can't say "If I were you, I went to the doctor"), English does not grammaticalize a generic concept of modality (nor does it have a robust grammatical category "subjunctive" as French does), but instead has several common constructions that can be used to convey different types of modality. The modal preterite construction cannot be used in the same situations as a modal auxiliary can. The modal preterite expresses modal remoteness, generally in one of the two types of constructions:

  • Conditional constructions. (e.g., If she injured herself, I'd rush to help.)
  • Expressing a counterfactual situation, but only in subordinate clauses which complement specific verbs that have an element of uncertainty in their meaning (e.g., wish, think).

Auxiliary verbs can be used to convey a larger range of modal meanings (with different auxiliaries having different modal meanings associated), some of which include remoteness. In a sentence like "I would go to the doctor (If I were you)," would expresses two types of modality: propensity (lexically) and remoteness (preterite form).

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