| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [pron] could not [vb infin] | 588 |
|
| 2 | [vb past] they [modal v] not [vb infin] | 139 |
|
| 3 | [vb past] they [vb mod] not [vb infin] | 139 |
|
| 4 | [verb] they could not [vb infin] | 120 |
|
| 5 | [vb past] they could [adv] [vb infin] | 100 |
|
| 6 | [vb past] they could not [vb infin] | 78 |
|
| 7 | [vb past] they could not [verb] | 78 |
|
