| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [adv] [adv] [noun] | 13 |
|
| 2 | could [verb] [adv] [adv] [noun] | 13 |
|
| 3 | could [verb] [adv] [adv] [noun] | 6 |
|
