| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have [been] [adj] | 353 |
|
| 2 | [modal v] have [been] some | 104 |
|
| 3 | could have [been] [det] | 63 |
|
| 4 | could [verb] [been] some | 9 |
|
| 5 | could have [be] some | 9 |
|
| 6 | could have [been] some | 9 |
|
