| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have [verb] [prep] [art] | 273 |
|
| 2 | could [pers pn] [verb] [prep] [art] | 98 |
|
| 3 | [pers pn] have [verb] [prep] [art] | 66 |
|
| 4 | could [pers pn] have [verb] [prep] | 29 |
|
| 5 | could [pers pn] have [verb] [art] | 18 |
|
