| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [verb] been [noun] | 675 |
|
| 2 | could [verb] [be] [noun] | 217 |
|
| 3 | could [verb] be [noun] | 217 |
|
| 4 | could [verb] [been] [noun] | 95 |
|
