| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [verb] [pron] [vb past] | 1119 |
|
| 2 | [vb mod] [verb] [pron] [vb past] | 1119 |
|
| 3 | must [verb] [pron] [verb] | 517 |
|
| 4 | must [verb] [pron] [vb past] | 97 |
|
