| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] could all have [verb] | 8 |
|
| 2 | [pron] could all have [verb] | 8 |
|
| 3 | could all have be [verb] | 9 |
|
| 4 | could all have been [verb] | 9 |
|
| 5 | could all have [been] [verb] | 9 |
|
| 6 | could all have [be] [verb] | 9 |
|
