| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [det] [noun] have been a [noun sg] | 37 |
|
| 2 | [det] [noun sg] have been a [noun] | 29 |
|
| 3 | [det] [noun] has been a [noun] | 24 |
|
| 4 | this [noun] have been a [noun] | 19 |
|
| 5 | [det] [noun] had been a [noun] | 10 |
|
| 6 | [det] [noun pl] have been a [noun] | 7 |
|
| 7 | that [noun] have been a [noun] | 6 |
|
