| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | could have been [prep] [adj] [noun] | 19 |
|
| 2 | could have been [prep] [adj] [noun] | 19 |
|
| 3 | could [vb infin] been [prep] [adj] [noun] | 19 |
|
| 4 | could [verb] been [prep] [adj] [noun] | 19 |
|
| 5 | could [verb] been [prep] [adj] [noun sg] | 16 |
|
| 6 | could [verb] been in [adj] [noun] | 11 |
|
| 7 | could [verb] been in [adj] [noun] | 11 |
|
| 8 | could [verb] been [prep] [det] [noun] | 11 |
|
| 9 | could [verb] been [prep] [adj] [noun] | 8 |
|
