| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [vb infin] [adv] | 2818 |
|
| 2 | [modal v] [vb infin] so | 1648 |
|
| 3 | must [vb infin] [adv] | 1512 |
|
| 4 | must [verb] so | 92 |
|
| 5 | must [vb infin] so | 91 |
|
