| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | why could [not/n't] i [vb infin] | 9 |
|
| 2 | why could [not/n't] i [vb infin] | 9 |
|
| 3 | [Wh adv] could [not/n't] i [vb infin] | 9 |
|
| 4 | [adv] could [not/n't] i [vb infin] | 9 |
|
| 5 | [pers pn] could [not/n't] i [vb infin] | 5 |
|
| 6 | [pron] could [not/n't] i [vb infin] | 5 |
|
| 7 | could [not/n't] i [vb infin] [pron] | 6 |
|
| 8 | could [not/n't] i [vb infin] [pers pn] | 6 |
|
