| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [not/n't] [verb] a [noun] | 571 |
|
| 2 | [vb mod] [not/n't] have a [noun] | 281 |
|
| 3 | [modal v] [not/n't] have a [noun] | 281 |
|
| 4 | could [adv] have a [noun] | 41 |
|
| 5 | could [not/n't] have [art] [noun] | 32 |
|
| 6 | could [not/n't] have [art] [noun] | 32 |
|
| 7 | could [not/n't] have a [noun] | 18 |
|
| 8 | could [not/n't] have a [noun] | 17 |
|
