| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [pron] could have | 529 |
|
| 2 | [verb] [pers pn] could have | 487 |
|
| 3 | [verb] they [vb mod] have | 437 |
|
| 4 | [verb] they [modal v] have | 437 |
|
| 5 | [verb] they could [vb infin] | 363 |
|
| 6 | [verb] they could [verb] | 363 |
|
| 7 | [verb] they could have | 53 |
|
| 8 | [verb] they could have | 44 |
|
| 9 | [verb] they could have | 44 |
|
