| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [pron] [modal v] [verb] | 7877 |
|
| 2 | [vb past] [pers pn] [modal v] [verb] | 7625 |
|
| 3 | [verb] it [modal v] [verb] | 3197 |
|
| 4 | [vb past] it [modal v] [verb] | 872 |
|
