More informal options:
 * 24. I'd love to go to the concert with you, but I'm tied up.
 * 25. You're being really noisy!
 * 26. You're such a complainer.
 * 27. You didn't give me a heads up about the meeting.
 * 28. I wish I'd told him what happened last night.
 * 29. I bombed my driving test last week.
 * 30. I was late for work this morning.
More formal options:
 * 24. I would like to attend the concert with you, however, I am preoccupied.
 * 25. Your noise level is excessive at this late hour.
 * 26. You have a tendency to complain excessively.
 * 27. You omitted to inform me about the meeting.
 * 28. I regretted having not informed him of the previous night's events.
 * 29. I was unsuccessful in my driving test last week.
 * 30. I arrived late for work this morning.

24. Although i want to go to the concert, i am búsy 
25. Don't make so much noise late at night 
26. Don't complaint all the time
27.