| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] have been [prep] [det] | 389 |
|
| 2 | [pron] could have been [prep] | 49 |
|
| 3 | [pron] could have been [det] | 43 |
|
| 4 | could have been [prep] [det] | 21 |
|
