| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [pers pn] could [adv] have been | 49 |
|
| 2 | but [pers pn] [modal v] [adv] have been | 33 |
|
| 3 | but [pers pn] could [adv] have been | 25 |
|
| 4 | [coord] [pers pn] could [adv] have been | 25 |
|
| 5 | but [pers pn] could [adv] have [been] | 16 |
|
| 6 | but [pers pn] could [adv] have be | 16 |
|
| 7 | but [pers pn] could [adv] have [be] | 16 |
|
| 8 | but [pers pn] could [adv] [verb] been | 16 |
|
| 9 | but [pers pn] could [adv] have been | 16 |
|
| 10 | but [pron] could [adv] have been | 16 |
|
