| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [vb pp] for [noun] | 2043 |
|
| 2 | must [be] [vb pp] for | 322 |
|
| 3 | must [be] [vb pp] [noun] | 58 |
|
| 4 | must [be] for [noun] | 20 |
|
