| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] they [adv] | 3672 |
|
| 2 | they could [adv] | 2522 |
|
| 3 | [vb past] they could | 330 |
|
| 4 | [vb past] could [adv] | 58 |
|
