| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it could [not/n't] [vb infin] | 469 |
|
| 2 | [Wh adv] it could [vb infin] | 49 |
|
| 3 | [Wh adv] it could [not/n't] | 12 |
|
