23. can’t have enjoyed his holiday

24. may have seen me

25. needn’t have studied this unit

26. shouldn’t have parked outside the train station

27. shouldn’t have bought the new car

28. could have left the English book at home because it is not here

29. may not have meant what she said about you

30. must have taken your jacket by mistake

31. must be tired after your cruise

23. can’t have enjoyed his holiday

(can't have P2: chắc chắn đã không...)

24. may have seen me

(may have P2: có lẽ đã...)

25. needn’t have studied this unit

(needn't have P2: đáng lẽ ra không cần...)

26. shouldn’t have parked outside the train station

(shouldn't have P2: đáng lẽ ra không nên...)

27. shouldn’t have bought the new car

28. could have left the English book at home because it is not here

(could have P2: có thể đã...)

29. may not have meant what she said about you

(must not have P2: chắc hẳn đã không...)

30. must have taken your jacket by mistake

31. must be tired after your cruise

(must be: chắc có lẽ là...)