| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have been [noun] [prep] | 13 |
|
| 2 | could have been [noun sg] [prep] | 7 |
|
| 3 | could have been [noun pl] [prep] | 5 |
|
| 4 | could have been [noun] of | 5 |
|
