| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | but [pron] could have been [prep] | 7 |
|
| 2 | but [pron] could have be [prep] | 7 |
|
| 3 | but [pers pn] could have be [prep] | 7 |
|
| 4 | but it could have be [prep] | 6 |
|
| 5 | but it could have be [prep] | 6 |
|
