| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have been [adj] | 750 |
|
| 2 | must have been [adj] | 546 |
|
| 3 | must have been [num] | 94 |
|
| 4 | must have been [det] | 92 |
|
| 5 | must have been some | 42 |
|
| 6 | must have been some | 42 |
|
| 7 | must have been one | 40 |
|
| 8 | must have been one | 40 |
|
| 9 | must have been many | 20 |
|
| 10 | must have been many | 20 |
|
| 11 | must have been mad | 15 |
|
| 12 | must have been [adj -er] | 15 |
|
| 13 | must have been mad | 15 |
|
| 14 | must have been aware | 12 |
|
| 15 | must have been aware | 12 |
|
| 16 | must have been asleep | 12 |
|
| 17 | must have been terrible | 12 |
|
| 18 | must have been awful | 12 |
|
| 19 | must have been terrible | 12 |
|
| 20 | must have been awful | 12 |
|
| 21 | must have been asleep | 12 |
|
| 22 | must have been difficult | 12 |
|
| 23 | must have been difficult | 12 |
|
| 24 | must have been hard | 11 |
|
| 25 | must have been hard | 11 |
|
| 26 | must have been obvious | 10 |
|
| 27 | must have been obvious | 10 |
|
| 28 | must have been able | 8 |
|
| 29 | must have been responsible | 8 |
|
| 30 | must have been disappointed | 8 |
|
