| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] to [art] [noun] | 4367 |
|
| 2 | must be [vb pp] to [art] | 334 |
|
| 3 | must be [vb pp] to [noun] | 88 |
|
| 4 | must be [vb pp] [art] [noun] | 80 |
|
| 5 | must be to [art] [noun] | 12 |
|
