| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] [prep] [adj] | 1750 |
|
| 2 | could have [been] [adj] | 353 |
|
| 3 | could have [been] [prep] | 99 |
|
| 4 | could have [prep] [adj] | 11 |
|
