| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could n't [verb] [adv] [pron] | 225 |
|
| 2 | could n't [verb] [adv] [pers pn] | 140 |
|
| 3 | [vb mod] n't [verb] [adv] they | 72 |
|
| 4 | [modal v] n't [verb] [adv] they | 72 |
|
| 5 | could [adv] [verb] [adv] they | 31 |
|
| 6 | could [not/n't] [verb] [adv] they | 24 |
|
| 7 | could not [verb] [adv] they | 24 |
|
| 8 | could n't [verb] [adv] they | 16 |
|
| 9 | could n't [verb] [adv] they | 16 |
|
