| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [vb pp] a [noun] | 181 |
|
| 2 | could [vb infin] [adv] a [noun] | 158 |
|
| 3 | [vb infin] [vb pp] [adv] a [noun] | 89 |
|
| 4 | could [vb infin] [vb pp] [adv] a | 18 |
|
| 5 | could [vb infin] [vb pp] [adv] [noun] | 12 |
|
