| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [be] [verb] in | 945 |
|
| 2 | must [be] [vb pp] in | 918 |
|
| 3 | [modal v] [be] found in | 886 |
|
| 4 | [vb mod] [be] found in | 886 |
|
| 5 | must [be] found [prep] | 38 |
|
| 6 | must [be] found in | 6 |
|
| 7 | must [be] find in | 6 |
|
