| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] it [modal v] to | 13 |
|
| 2 | [vb past] it [vb mod] to | 13 |
|
| 3 | [vb past] it ought to | 11 |
|
| 4 | [vb past] it ought to | 11 |
|
