| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be [prep] [det] [noun] | 486 |
|
| 2 | [vb mod] be [prep] [det] [noun] | 486 |
|
| 3 | must be [prep] [adj] [noun] | 117 |
|
| 4 | must be [prep] [det] [noun] | 28 |
|
| 5 | must [be] [prep] [det] [noun] | 28 |
|
