| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could [not/n't] [verb] [noun] | 596 |
|
| 2 | [Wh pn] [vb mod] [not/n't] [verb] [noun] | 107 |
|
| 3 | [Wh pn] [modal v] [not/n't] [verb] [noun] | 107 |
|
| 4 | [Wh pn] could [adv] [verb] [noun] | 53 |
|
| 5 | [Wh pn] could [not/n't] [verb] [noun] | 36 |
|
