| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [Wh det] [pers pn] could have been | 6 |
|
| 2 | [prep] [Wh det] [pers pn] could have be | 6 |
|
| 3 | [prep] which [pers pn] could have [be] | 6 |
|
| 4 | [prep] [Wh det] [pers pn] could have [been] | 6 |
|
