| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | that it must have been [adj] | 7 |
|
| 2 | that it must [verb] been [adj] | 7 |
|
| 3 | that it must [vb infin] been [adj] | 7 |
|
| 4 | that it must [verb] been [adj] | 7 |
|
| 5 | that it must have been [adj] | 7 |
|
