With "would", the sentences seem to be talking about what generally or habitually used to happen in the described circumstances. However, the subject matter of the sentences doesn't suit the interpretation well. The first one doesn't work at all as far as I can see (because "last night" seems to refer to one specific night), while the second seems marginal.
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pructusWhat I am trying to know is the structure, "if + past tense -- would", past tense meaning the past, would meaning the present or future.Generally speaking, I don't think "would" is likely to be the best choice in that case. It may be intelligible, but another modal, such as "will" or "should", will normally be preferable, I think. Having said that, som
GPYWith "would", the sentences seem to be talking about what generally or habitually used to happen in the described circumstances.I should clarify ... this is with no context and assuming that correct English has been used. In a real situation, where you were obviously talking about the boss's reaction now to events of yesterday, "If you didn’t finish the jo
pructusI'd be surprised if she was at the party yesterday.This one works fairly well. "will" seems less likely here, but this is probably influenced by the fact that "I would be surprised" is a more common idiomatic expression anyway, independent of the context of your question.
pructusThe intended meaning of "I'd be surprised if she was at the party yesterday." is....I'd be surprised (today, or now) if she was at the party yesterday.Is the intended meaning being delivered well by "I'd be surprised if she was at the party yesterday."?Yes.