| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it could have been [adj] | 97 |
|
| 2 | it [modal v] have been [det] | 82 |
|
| 3 | it [vb mod] have been [det] | 82 |
|
| 4 | [pron] could have been [det] | 43 |
|
| 5 | [pers pn] could have been [det] | 28 |
|
| 6 | it could have been [det] | 19 |
|
| 7 | it could have been [det] | 19 |
|
| 8 | it could have [be] [det] | 19 |
|
| 9 | it could [verb] been [det] | 19 |
|
| 10 | it could have be [det] | 19 |
|
| 11 | it could have [been] [det] | 19 |
|
