| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be [vb pp] [prep] [num] [noun] | 1275 |
|
| 2 | must be [vb pp] [prep] [adj] [noun] | 702 |
|
| 3 | must be [verb] [prep] [num] [noun] | 115 |
|
| 4 | must [be] [vb pp] [prep] [num] [noun] | 114 |
|
