| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [adv] [verb] [pers pn] | 4159 |
|
| 2 | [adv] have [verb] [pers pn] | 2569 |
|
| 3 | could [adv] have [verb] | 1825 |
|
| 4 | could have [verb] [pers pn] | 876 |
|
| 5 | could [adv] have [pers pn] | 49 |
|
