| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [verb] [adv] | 3470 |
|
| 2 | could [adv] [vb infin] [adv] | 3465 |
|
| 3 | [modal v] [adv] go [adv] | 1902 |
|
| 4 | could [adv] go [adv] | 298 |
|
