| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which could [not/n't] be [verb] to | 6 |
|
| 2 | [Wh det] could [not/n't] be [verb] to | 6 |
|
| 3 | [Wh det] could not be [verb] to | 6 |
|
| 4 | [Wh det] could [not/n't] be [vb pp] to | 6 |
|
