I've heard that it's impossible to sound like a native speaker unless one starts speaking the language before the age of twelve.
Hailing a cab in Manhattan at 5:00 p.m. is nearly impossible.
We are in danger of making life impossible for a large number of animal species.
Knowing how much school for my kids is costing, it's impossible to relax with a beer and take it easy.
Prime numbers are like life; they are completely logical, but impossible to find the rules for, even if you spend all your time thinking about it.
Though Tom's English seems quite good at times, he doesn't seem to know his limitations and it's impossible to convince him that he's wrong when he makes a mistake.
It is impossible to calculate the moral mischief, if I may so express it, that mental lying has produced in society.
No matter how we try, it is impossible to distinguish good people from bad people by outward appearances.
It is impossible to escape the impression that people commonly use false standards of measurement — that they seek power, success and wealth for themselves and admire them in others, and that they underestimate what is of true value in life.
It seems that it's impossible to distinguish an obsessional neurosis from an intense love from a biochemical perspective.
Beauty is a letter of recommendation which it is almost impossible to ignore.
People who count their chickens before they are hatched act very wisely because chickens run about so absurdly that it's impossible to count them accurately.
My dictionary doesn't have the word "Impossible".
Do I really have that good a personality? "Impossible. After all, there's this time as well, but in middle school you sold off girl's pants all over to bring in the money."