| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] must have been [adj] | 11 |
|
| 2 | [coord] must have been [adj] | 11 |
|
| 3 | [coord] must [vb infin] been [adj] | 11 |
|
| 4 | [coord] must [verb] been [adj] | 9 |
|
| 5 | but must [verb] been [adj] | 6 |
|
| 6 | and must [verb] been [adj] | 5 |
|
