| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | not [verb] a [noun] [noun] | 545 |
|
| 2 | could [verb] a [noun] [noun] | 250 |
|
| 3 | could not [verb] a [noun] | 208 |
|
| 4 | could not [verb] [noun] [noun] | 50 |
|
