| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [vb past] it [modal v] | 185 |
|
| 2 | [adv] [vb past] it [vb mod] | 185 |
|
| 3 | [adv] [vb past] [pron] could | 164 |
|
| 4 | [adv] [verb] it could | 79 |
|
| 5 | [adv] [vb past] it could | 13 |
|
