| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [verb] [verb] [pron] | 1272 |
|
| 2 | [vb mod] [verb] [verb] i | 950 |
|
| 3 | [modal v] [verb] [verb] i | 950 |
|
| 4 | must [verb] [verb] i | 65 |
|
