| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [vb infin] [adv] | 1512 |
|
| 2 | [vb infin] i [adv] | 1197 |
|
| 3 | must [vb infin] i | 528 |
|
| 4 | must i [adv] | 6 |
|
