| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [vb pp] by the | 251 |
|
| 2 | must be [vb pp] by the | 251 |
|
| 3 | must be approved by the | 18 |
|
| 4 | must be signed by the | 12 |
|
| 5 | must be accompanied by the | 9 |
|
| 6 | must be made by the | 6 |
|
| 7 | must be accepted by the | 6 |
|
| 8 | must be borne by the | 5 |
|
| 9 | must be taken by the | 5 |
|
