| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [vb pp] at [det] | 45 |
|
| 2 | must [be] [vb pp] at all | 23 |
|
| 3 | must [be] [vb pp] at this | 11 |
|
| 4 | must [be] avoided at [det] | 9 |
|
| 5 | must [be] made at [det] | 5 |
|
