| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [verb] at the | 2981 |
|
| 2 | must [verb] [verb] the | 504 |
|
| 3 | must [verb] at the | 84 |
|
| 4 | must [verb] [verb] at | 64 |
|
