| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] for [art] [noun] | 1231 |
|
| 2 | must be [vb pp] for [art] | 91 |
|
| 3 | must be [vb pp] [art] [noun] | 80 |
|
| 4 | must be [vb pp] for [noun] | 49 |
|
| 5 | must be for [art] [noun] | 18 |
|
