| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [verb] [vb pp] [adv] [noun] | 55 |
|
| 2 | could [verb] [vb pp] [adv] [noun] | 12 |
|
| 3 | could [verb] [verb] [adv] [noun] | 5 |
|
