| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] could [adv] have have [art] | 6 |
|
| 2 | [pron] could [adv] have have [art] | 6 |
|
| 3 | could [adv] have have [art] [adj] | 7 |
|
