| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] it have been [art] [noun] | 10 |
|
| 2 | [vb past] it have been [art] [noun] | 10 |
|
| 3 | [vb past] it have been a [noun] | 9 |
|
| 4 | [vb past] it have been a [noun] | 6 |
|
