| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] have [verb] [prep] | 163 |
|
| 2 | it could [adv] [verb] [prep] | 58 |
|
| 3 | it could have [verb] [prep] | 36 |
|
| 4 | it [adv] have [verb] [prep] | 30 |
|
| 5 | it could [adv] have [verb] | 23 |
|
