| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [vb infin] been [adj] [adj] [noun] | 18 |
|
| 2 | must have been [adj] [adj] [noun] | 18 |
|
| 3 | must have been [adj] [adj] [noun] | 18 |
|
| 4 | must [verb] been [adj] [adj] [noun pl] | 13 |
|
| 5 | must [verb] been [det] [adj] [noun] | 13 |
|
| 6 | must [verb] been many [adj] [noun] | 7 |
|
| 7 | must [verb] been many [adj] [noun] | 7 |
|
