What is the difference between these two
"We would get bashed if we did that" and "We will get bashed if we do that"
The difference lies in what the speaker is thinking about.
One clear case is when you actually plan NOT to 'do that'. For example
We can't, we mustn't, we won't do so-and-so. We'd get bashed if we did that.
Only PAST is possible because you've already said that it's not a real possibility.
An even clearer case is when 'doing that' isn't even a possibility.
We've never done so-and-so, and we aren't doing so-and-so now. We'd get bashed if we did that
You can't use PRESENT because it's an impossible condition.
Grammar books use the terms remote condition and unreal condition for the PAST sentences, and real condition for the PRESENT sentences.
But what if i want to say that "we did it in the past"
Let's make a distinction between PAST TENSE and PAST TIME.
Let's also make a distinction between the REAL WORLD and an IMAGINED WORLD.
In these conditional sentences
PRESENT TENSE is used for FUTURE TIME (or sometimes PRESENT TIME) in the REAL WORLD
We'll get bashed if we do that.
PAST TENSE is used for PRESENT TIME or FUTURE TIME in an IMAGINED WORLD
We'd get bashed if we did that.
I find it useful to think of PRESENT TIME as NOW and PAST TIME as THEN.
But THEN can also mean in that imagined world.
In English, if we speak of the PAST TIME
we can place things at a definite time THEN using the PAST SIMPLE
We did that last week
we can place things in the period UP TO NOW using the PRESENT PERFECT( with no sense of a definite THEN)
We've done that today
we can place things in the period UP TO THEN using the PAST PERFECT
We'd already done that
we can place things at a definite time BEFORE THEN also using the PAST PERFECT
We'd done that the previous day
This last sentence speaks of BEFORE THEN when THEN=PAST TIME.
But we may want to speak of before BEFORE THEN when THEN=IN AN IMAGINED WORLD.
That's what we do with an unreal condition in PAST TIME — using the PAST PERFECT
We would have got bashed if we'd done that
It's almost like an equation
PAST + PAST = PAST PERFECT
In this sort of discussion, it's useful to think of will not as a FUTURE TENSE but
will do that — PRESENT
would do that — PAST
will have done that — PRESENT PERFECT
would have done that — PAST PERFECT
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