| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] must [verb] been [adj] | 210 |
|
| 2 | [noun] [vb mod] [verb] been [adj -er] | 122 |
|
| 3 | [noun] [modal v] [verb] been [adj -er] | 122 |
|
| 4 | [noun] must [verb] [been] [adj -er] | 10 |
|
| 5 | [noun] must [verb] be [adj -er] | 10 |
|
| 6 | [noun] must [verb] been [adj -er] | 10 |
|
| 7 | [noun] must [verb] [be] [adj -er] | 10 |
|
