| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] have [verb] | 1825 |
|
| 2 | could [adv] [verb] that | 403 |
|
| 3 | [adv] have [verb] that | 236 |
|
| 4 | could have [verb] that | 91 |
|
| 5 | could [adv] have that | 8 |
|
