| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] could [adv] have been | 321 |
|
| 2 | but [pers pn] could [adv] have | 77 |
|
| 3 | but [pers pn] could have been | 52 |
|
| 4 | but [pers pn] [adv] have been | 11 |
|
| 5 | but could [adv] have been | 6 |
|
