| Idiom | Meaning | Example | 
| you can thank your lucky stars | 
you were lucky, be thankful you are safe
 | 
He can thank his lucky stars that a doctor was there. He nearly died.
 | 
| you can't make a silk purse out of a sow's ear | 
you cannot improve the quality of junk; cannot make gold from iron
 | 
When Hal put a Mercedes star on his Ford, I said, "You can't make  a silk purse out of a sow's ear."
 | 
| you can't sell anybody if you don't love everybody | 
you will be more successful if you have love in your heart
 | 
"So you're going into sales?" "Yes. Do you have any advice?" "Well, a saying from Beverly Hills Cop may be helpful in sales - or any occupation: 
You can't sell anybody if you don't love everybody!"
 | 
| you can't teach an old dog new tricks | 
old dogs and old people do not like to change or learn, die hard
 | 
Our senior employees don't like computer training - you can't teach an old dog new tricks.
 | 
| you can't tell a book by its cover | 
the cover or surface does  not reveal its contents, beauty is only skin deep
 | 
If you buy a car because it looks nice, remember this: you can't tell a book by its cover.
 | 
| you don't miss the water till the well runs dry | 
you do not appreciate some things until they go away or become extinct
 | 
Now we have only memories of our song birds. You don't miss the water till the well runs dry.
 | 
| you don't say | 
that is surprising, how about that
 | 
"We have ten kids," the man said. "You don't say!" my mom replied.
 | 
| you got it | 
you have the answer, you are doing it right
 | 
"You got it, kid!" the coach said. "That's the way to score!"
 | 
| you had to be there | 
to understand, you should have been there with me; it was funny then
 | 
When I said, "Goo!" everybody laughed and clapped. I guess you had to be there.
 | 
| you have to be good to be lucky | 
people with ability cause their own good luck, prepare like crazy
 | 
Athletes don't wait for good luck. They try to improve, knowing you have to be good to be lucky.
 |