| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [be] [verb] for | 340 |
|
| 2 | must [be] [vb pp] for | 322 |
|
| 3 | must [be] specified [prep] | 21 |
|
| 4 | must [be] specified [prep] | 21 |
|
| 5 | [vb mod] [be] specified for | 11 |
|
| 6 | [modal v] [be] specified for | 11 |
|
| 7 | must [be] specified for | 10 |
|
| 8 | must [be] specify for | 10 |
|
| 9 | must [be] specified for | 10 |
|
| 10 | must [be] specified for | 10 |
|
