| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [verb] [verb] | 691 |
|
| 2 | must be [vb pp] [verb] | 667 |
|
| 3 | [vb mod] be found [verb] | 174 |
|
| 4 | [modal v] be found [verb] | 174 |
|
| 5 | must [be] found [verb] | 12 |
|
| 6 | must be found [verb] | 12 |
|
| 7 | must be found [verb] | 12 |
|
| 8 | must be find [verb] | 12 |
|
| 9 | must [be] found [verb] | 12 |
|
