| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [pron] could [verb] [adv] | 1516 |
|
| 2 | [conj] [pers pn] could [verb] [adv] | 1446 |
|
| 3 | [conj] they [modal v] [verb] [adv] | 1279 |
|
| 4 | [conj] they could [verb] [adv] | 217 |
|
