| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [adv] | 3235 |
|
| 2 | could [adv] do | 941 |
|
| 3 | [adv] [adv] do | 377 |
|
| 4 | could [adv] do | 283 |
|
