| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [pron] could [verb] been | 103 |
|
| 2 | [verb] what [vb mod] [verb] been | 70 |
|
| 3 | [verb] what [modal v] [verb] been | 70 |
|
| 4 | [verb] what could [verb] [be] | 10 |
|
| 5 | [verb] what could [verb] be | 10 |
|
| 6 | [verb] what could [verb] [been] | 10 |
|
| 7 | [verb] what could [verb] been | 10 |
|
