| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who could [not/n't] [vb infin] [noun] | 36 |
|
| 2 | [Wh pn] could [not/n't] [vb infin] [noun] | 36 |
|
| 3 | [Wh pn] could not [vb infin] [noun] | 22 |
|
| 4 | [Wh pn] could [not/n't] [vb infin] [noun sg] | 22 |
|
| 5 | [Wh pn] could n't [vb infin] [noun] | 14 |
|
| 6 | [Wh pn] could [not/n't] [vb infin] [noun pl] | 7 |
|
