| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [verb] within [art] [noun sg] | 14 |
|
| 2 | must [vb infin] within [art] [noun sg] | 14 |
|
| 3 | must [verb] within the [noun sg] | 12 |
|
| 4 | must [verb] within the [noun sg] | 12 |
|
