| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could possibly have been | 14 |
|
| 2 | could possibly have be | 14 |
|
| 3 | could possibly have [been] | 14 |
|
| 4 | could possibly have [be] | 14 |
|
| 5 | could possibly have [be] | 14 |
|
| 6 | could possibly have [be] | 14 |
|
