| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which be [verb] at [art] | 204 |
|
| 2 | must be [verb] at [art] | 88 |
|
| 3 | which must be [verb] at | 17 |
|
| 4 | which must be [verb] [art] | 6 |
|
