| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which must [verb] been [art] [adj] | 7 |
|
| 2 | which must [vb infin] been [art] [adj] | 7 |
|
| 3 | which must [verb] been [art] [adj] | 7 |
|
| 4 | which must have been [art] [adj] | 7 |
|
| 5 | which must have been [art] [adj] | 7 |
|
| 6 | which must [verb] been [art] [adj] | 6 |
|
| 7 | which must [verb] been a [adj] | 5 |
|
| 8 | which must [verb] been a [adj] | 5 |
|
