Express the opposite.
1) The team has won the game.They are winners.
2)You tried your chance.
3) His story was interesting.
4) Tom is a hard-working student.
5)It's useless to take part in the World Teenagers' Competition
6)His advice was useful and helpful.

1) losers (проигравшие) 2) miss chance (упустить возможность) 3) boring (скучный) 4) lazy (ленивый) 5) useful (полезный) 6) useless and unhelpful (беcполезный)