| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not [verb] [pron] could [verb] [noun] | 22 |
|
| 2 | not know [pron] [modal v] [verb] [noun] | 6 |
|
| 3 | [adv] know [pron] could [verb] [noun] | 6 |
|
