Should have vs Shouldn't Have

Lets look closely at the modal 'should' in past reductions.

Please don't get confused....

Shouldn't have --- means something happened that wasn't advisable or expected...
İ.e You shouldn't have eaten so fast.
Means: You ate too fast and now you possibly have a stomache ache.

Should have --- means something DİDNT happen but was advisable or expected.
İ.e You should have eaten faster.
Means: it was expected that you eat fast to not miss the the bus... but you didn't. You ate too slow and missed it.

More examples :


Bob's plane should have arrived over an hour ago.
(We expected Bob's plane to arrive over an hour ago,
but it didn't arrive--and it still hasn't arrived.)
_____________________________________

Tanya shouldn't have said what she did.
(Although it wasn't advisable for Tanya to have said
what she said, she did it anyway.)