| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | so [pron] must [vb infin] | 142 |
|
| 2 | [adv] [indef pn] must [vb infin] | 52 |
|
| 3 | so [indef pn] [modal v] [vb infin] | 49 |
|
| 4 | so [indef pn] must [verb] | 9 |
|
