| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [verb] been [noun sg] | 296 |
|
| 2 | must [verb] been [noun] | 120 |
|
| 3 | must [verb] be [noun sg] | 52 |
|
| 4 | must [verb] [be] [noun sg] | 52 |
|
| 5 | must [verb] [been] [noun sg] | 47 |
|
