| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be [vb pp] at this | 90 |
|
| 2 | must be [vb pp] [prep] this | 65 |
|
| 3 | must be [vb pp] [prep] this | 65 |
|
| 4 | must be [vb pp] at [adj] | 60 |
|
| 5 | must be [vb pp] at this | 11 |
|
| 6 | must be [verb] at this | 11 |
|
| 7 | must be [vb pp] at this | 11 |
|
| 8 | must [be] [vb pp] at this | 11 |
|
| 9 | must [be] [vb pp] at this | 11 |
|
