| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [vb infin] at [adj] [noun pl] | 9 |
|
| 2 | must [vb infin] at [det] [noun pl] | 6 |
|
| 3 | must [vb infin] at all [noun pl] | 6 |
|
| 4 | must [vb infin] at all [noun pl] | 6 |
|
