| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it must have been [adj] | 156 |
|
| 2 | it must have been [adj] | 152 |
|
| 3 | it must have been [adj] | 102 |
|
| 4 | it must have been [det] | 26 |
|
| 5 | it must have been [num] | 26 |
|
| 6 | it must have been some | 12 |
|
| 7 | it must have been some | 12 |
|
| 8 | it must have been one | 9 |
|
| 9 | it must have been one | 9 |
|
| 10 | it must have been terrible | 8 |
|
| 11 | it must have been obvious | 8 |
|
| 12 | it must have been terrible | 8 |
|
| 13 | it must have been obvious | 8 |
|
| 14 | it must have been awful | 7 |
|
| 15 | it must have been difficult | 7 |
|
| 16 | it must have been difficult | 7 |
|
| 17 | it must have been awful | 7 |
|
| 18 | it must have been hard | 5 |
|
| 19 | it must have been hard | 5 |
|
