| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] must have [vb pp] at [art] | 6 |
|
| 2 | must have [vb pp] at [art] [noun] | 11 |
|
| 3 | must have [vb pp] at [art] [noun sg] | 10 |
|
