| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must be [vb pp] at [art] | 82 |
|
| 2 | [pron] must be [vb pp] at | 54 |
|
| 3 | [pron] must be [vb pp] [art] | 42 |
|
| 4 | [pron] must be at [art] | 9 |
|
| 5 | [pron] be [vb pp] at [art] | 7 |
|
