| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [vb past] [pron] could | 164 |
|
| 2 | [adv] [vb past] they [modal v] | 91 |
|
| 3 | [adv] [vb past] they [vb mod] | 91 |
|
| 4 | [adv] [verb] they could | 66 |
|
| 5 | [adv] [vb past] they could | 16 |
|
