I didn't buy food, now I'm hungry
You should have eaten something
He forgot to pay his credit card, now he's in debt
He should have paid
In 1999 Yahoo refused to buy google for $1 million dollars
Yahoo should have bought / Yahoo shouldn't have refused
I forgot my passport at home, now I can't travel
You should have remembered to take your passport
I didn't study for the test, so I got 0 on it
You should have studied more
I forgot to use sunscreen lotion, now my whole body is sun burned
You should have used sunscreen lotion
I broke my arm playing basketball
You shouldn't have played