| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] must be [prep] | 502 |
|
| 2 | [noun] must be [prep] | 502 |
|
| 3 | [noun] [vb mod] be to | 201 |
|
| 4 | [noun] [modal v] be to | 201 |
|
| 5 | [noun] must [be] to | 23 |
|
| 6 | [noun] must be to | 23 |
|
| 7 | [noun] must be to | 23 |
|
| 8 | [noun] must be to | 23 |
|
| 9 | [noun] must [be] to | 23 |
|
