| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could [pers pn] have be | 91 |
|
| 2 | could [pers pn] have been | 91 |
|
| 3 | could it have be | 34 |
|
| 4 | could she have be | 19 |
|
| 5 | could he have be | 15 |
|
| 6 | could i have be | 12 |
|
| 7 | could they have be | 7 |
|
