Reply to "mixed conditional?"

Hi, Freeguy,

I think "You shouldn't be so tired" is not modern usage; "Would" is what's meant. 

I see your point, but "should" can also be used to express deduction or probability.

I'll give you my point of view:

  1. You shouldn't be so tired if you went to bed earlier.
  2. You shouldn't be so tired if you had gone to bed earlier.
  3. You wouldn't be so tired if you went to bed earlier.
  4. You wouldn't be so tired if you had gone to bed earlier.


If "should" is used as the first person form of "would," then (1) is, just like (3), a type 2 conditional, which might sound like a piece of advice: Go to bed earlier and you won't feel so tired next time.

If "should" is a modal indicating probability, then I interpret "went" as a real past in (1), meaning: 1': If it is true that you went to bed earlier (than usual), then you shouldn't be so tired now (= there's no accounting for your current tiredness).

Again, if "should" is used as the first person form of "would," then (2) is, just like (4), a mixed conditional, combining an unfulfilled past condition (if you had gone to bed earlier) with a present result (you wouldn't be so tired -> the person is very tired).

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