| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] must be [prep] [noun] | 132 |
|
| 2 | [noun] [modal v] be for [noun] | 72 |
|
| 3 | [noun] must be for [noun] | 7 |
|
| 4 | [noun] must [be] for [noun] | 7 |
|
| 5 | [noun] must [be] for [noun] | 7 |
|
