| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [modal v] [verb] been | 4394 |
|
| 2 | [noun] must [verb] been | 928 |
|
| 3 | [noun sg] must [verb] [be] | 574 |
|
| 4 | [noun sg] must [verb] be | 574 |
|
| 5 | [noun sg] must [verb] [been] | 546 |
|
