| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could n't [pers pn] [verb] i | 9 |
|
| 2 | could [not/n't] [pers pn] [vb infin] i | 8 |
|
| 3 | could [not/n't] [pers pn] [verb] i | 5 |
|
