| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have [verb] at the | 9 |
|
| 2 | must [vb infin] [verb] at the | 9 |
|
| 3 | must [verb] [vb pp] at the | 9 |
|
| 4 | must have [verb] at the | 9 |
|
| 5 | must [verb] [verb] at the | 9 |
|
