| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have been [det] | 62 |
|
| 2 | could have [been] [det] | 62 |
|
| 3 | could have [been] any | 20 |
|
| 4 | could have [been] that | 10 |
|
| 5 | could have [been] some | 9 |
|
