| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [verb] to | 714 |
|
| 2 | must be [vb pp] to | 682 |
|
| 3 | [modal v] be returned to | 159 |
|
| 4 | [vb mod] be returned to | 159 |
|
| 5 | must be returned [prep] | 25 |
|
| 6 | must be returned [prep] | 25 |
|
| 7 | must be return to | 15 |
|
| 8 | must be returned to | 14 |
|
| 9 | must [be] returned to | 14 |
|
| 10 | must [be] returned to | 14 |
|
| 11 | must be returned to | 14 |
|
| 12 | must be returned to | 14 |
|
