| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [prep] [noun prp] | 41 |
|
| 2 | must be [prep] [noun prp] | 41 |
|
| 3 | [modal v] be for [noun prp] | 37 |
|
| 4 | must be for [noun] | 20 |
|
| 5 | must be for [noun prp] | 6 |
|
| 6 | must [be] for [noun prp] | 6 |
|
