| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [verb] [adv] [adv] [subord] [to-vb] | 41 |
|
| 2 | could [verb] [adv] [adv] [subord] [verb] | 16 |
|
| 3 | could [verb] [adv] [adv] [conj] [to-vb] | 6 |
|
| 4 | could [verb] [adv] [adv] [subord] [to-vb] | 6 |
|
