| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [verb] [adv] | 3631 |
|
| 2 | could [vb infin] [adv] | 3625 |
|
| 3 | [modal v] do [adv] | 2106 |
|
| 4 | could do [adv] | 339 |
|
| 5 | could do [adv] | 321 |
|
