| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [vb infin] [adv] on the [noun] | 11 |
|
| 2 | must [vb infin] [adv] on the [noun sg] | 9 |
|
| 3 | must [vb infin] [adv] on the [noun] | 6 |
|
| 4 | must [vb infin] [adv prt] on the [noun] | 5 |
|
