| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] have [verb] | 1825 |
|
| 2 | it could [adv] [verb] | 954 |
|
| 3 | it could [adv] have | 242 |
|
| 4 | it could have [verb] | 170 |
|
| 5 | it [adv] have [verb] | 141 |
|
