| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [vb infin] [vb pp] so | 34 |
|
| 2 | could have [verb] so | 33 |
|
| 3 | could [vb infin] do so | 25 |
|
| 4 | could [vb infin] [to-vb] so | 13 |
|
| 5 | could [vb infin] done so | 13 |
|
| 6 | could [vb infin] to do so | 11 |
|
| 7 | could afford [verb] so | 6 |
|
