| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] have | 3255 |
|
| 2 | could [adv] have | 1475 |
|
| 3 | [modal v] well have | 1187 |
|
| 4 | could well [verb] | 514 |
|
| 5 | could well [vb infin] | 507 |
|
| 6 | could well have | 164 |
|
| 7 | could well have | 162 |
|
