Don't be disappointed.
If she expects them to give her five days off work with pay, she's going to be disappointed.
We are born crying, spend our lives complaining, and die disappointed.
Blessed is the man who expects nothing, for he shall never be disappointed.
If nobody knows what's coming next, nobody will be disappointed.
In some situations, telling a white lie could be used to avoid people to be disappointed or get angry by or with someone.
They should not wait for help to come to them from elsewhere, or they will be disappointed.
I was extremely disappointed to see our national soccer team suffer a historic loss.
How disappointed my parents would be, if I should fail!
A four-year-old American tourist was disappointed to realize that, in fact, the Sichuan province is not entirely made of spicy beef, in spite of its famously piquant cuisine.
You may be disappointed if you fail, but you are doomed if you don't try.
Jennifer is very disappointed about the concert being cancelled. She really had her heart set on going.
Christopher Columbus once decided to burn absolutely everything in an entire village after one of the natives stole his parrot. He was disappointed that he couldn't burn their water. So he invented fluorine.
We were deeply disappointed at/about the result. / His parents were bitterly disappointed in/with him.
His parents were bitterly disappointed in/with him. He was disappointed to find they'd already left. She was disappointed (that) they hadn't phoned.