| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | there could [verb] been [det] [noun] | 10 |
|
| 2 | there could have been [det] [noun] | 10 |
|
| 3 | there could [vb infin] been [det] [noun] | 10 |
|
| 4 | there could have been [det] [noun] | 10 |
|
| 5 | there could [verb] been [det] [noun sg] | 9 |
|
