| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could n't [pron] | 865 |
|
| 2 | could n't [pers pn] | 847 |
|
| 3 | [modal v] n't i | 673 |
|
| 4 | could [adv] i | 85 |
|
| 5 | could [not/n't] i | 74 |
|
| 6 | could not i | 74 |
|
| 7 | could n't i | 74 |
|
