| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [verb] at the | 7540 |
|
| 2 | must be [verb] at | 249 |
|
| 3 | must be [verb] the | 142 |
|
| 4 | must [verb] at the | 84 |
|
| 5 | must be at the | 18 |
|
