| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] could have been [prep] [det] | 8 |
|
| 2 | [pron] could have [been] [prep] [det] | 8 |
|
| 3 | [pron] could have [been] [prep] [det] | 8 |
|
| 4 | [pers pn] could have [been] [prep] [det] | 5 |
|
