1) I'm sorry i messed your birthday party
⇒ I wish I hadn’t missed your birthday party.
2) He couldn't afford to buy the car
⇒ The car was too expensive to buy.
3) I'll pick the children up if you like
⇒ Would you like me to pick the children up ?
4) Tom is the most industrious pupil.
⇒ No other pupil is as industrious as Tom