| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [adv] [subord] [to-vb] | 511 |
|
| 2 | could [verb] [adv] [subord] | 229 |
|
| 3 | could [verb] [adv] [to-vb] | 128 |
|
| 4 | could [verb] [subord] [to-vb] | 8 |
|
