| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it could have [be] | 484 |
|
| 2 | [subord] it could [be] | 318 |
|
| 3 | [subord] it could have | 53 |
|
| 4 | [subord] could have [be] | 12 |
|
