| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] they could 've | 9 |
|
| 2 | [conj] they could 've | 8 |
|
| 3 | they could 've [verb] | 16 |
|
| 4 | they could 've [vb pp] | 15 |
|
