| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] have been [det] | 1456 |
|
| 2 | could [pron] have been | 102 |
|
| 3 | could have been [det] | 63 |
|
| 4 | could [pron] have [det] | 31 |
|
