| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [verb] been [conj] | 236 |
|
| 2 | must [verb] [be] [conj] | 41 |
|
| 3 | must [verb] be [conj] | 41 |
|
| 4 | must [verb] [been] [conj] | 26 |
|
