I'm going to show you three examples.
1. A - Have you got any change?
B - Do I have change? What for?
A - For the vending machine!
I would have thought that was pretty obvious.
: I think it's sufficient to just say,
"I thought that was pretty obvious."
because literally 'I' thought so in the past, which is a simple fact, but now I don't.
And "I would think that as pretty obvious." is possible in the context?
If so, what are the differences among them?
2. Let's say there are two kids playing in the garden
and their mum comes out to tell them in for dinner.
But the kids have gone somewhere, so she starts going around for them.
In some minutes, she finds the two and says.
"I would have known."
Why does she talk like that? What's the nuance?
I think it will do to say,
"I knew you would be here."
I wonder if "I would know" is a possible subsitute for the highlighted sentence.
If it could be, what are the differences among the three?
3. A - Was the party great?
B - I don't / wouldn't know. I wasn't there.
: I think if B goes for "I don't know",
it will mean he's just saying the plain fact that he wasn't there.
What if B replies, "I wouldn't know"?
What's the difference?
And is "I wouldn't have known" possible here?
If so, what are the differences?
I hear 'would do / would have done' structure is closely related to a hypothetical if,
but I can't seem to figure it out.
I was guessing 'would have done' might mean speculating about the past,
I've come to think it can't explain 'would do' option.
Help me out with this.
Thank you all.