| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] which must be [vb pp] at | 10 |
|
| 2 | [noun sg] which must be [vb pp] at | 6 |
|
| 3 | which must be [vb pp] at [art] | 8 |
|
| 4 | which must be [vb pp] at [art] | 8 |
|
| 5 | which must be [vb pp] at the | 7 |
|
| 6 | which must be [vb pp] at the | 7 |
|
