You can try to explain the last pair.Hello,
How are you? Hope you're doing well.
I'm really confused with these sentences,
It could have been more difficult. "It wasn't that hard at all. It could have been much more difficult."
It couldn't have been more difficult. "It was very difficult - so difficult in fact that it could not have been any more difficult than it was."
It could have been worse. "Ok, you broke you toe. It could have been worse. You could have broken you whole leg."
He couldn't have been more unfriendly. as above
He could have been more unfriendly.
I will be grateful to whom clarify them to me.
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