| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] n't it | 1314 |
|
| 2 | could n't [pron] | 865 |
|
| 3 | could n't [pers pn] | 847 |
|
| 4 | could [adv] it | 101 |
|
| 5 | could [not/n't] it | 99 |
|
| 6 | could not it | 99 |
|
| 7 | could n't it | 97 |
|
