| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could go [adv] | 679 |
|
| 2 | [modal v] go ahead | 276 |
|
| 3 | could go [adv] | 245 |
|
| 4 | could [verb] ahead | 40 |
|
| 5 | could go ahead | 31 |
|
