| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [pron] [modal v] [vb infin] | 7622 |
|
| 2 | [verb] it [modal v] [vb infin] | 3178 |
|
| 3 | [vb past] it [modal v] [verb] | 872 |
|
