| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] so [adv] | 53 |
|
| 2 | could [verb] so [adv] | 53 |
|
| 3 | could do so [adv] | 19 |
|
| 4 | could do so [adv] | 19 |
|
| 5 | could [verb] so far | 5 |
|
