| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] have been [noun] [prep] [det] | 12 |
|
| 2 | [modal v] have been [noun] [prep] [det] | 12 |
|
| 3 | [modal v] have been [noun sg] [prep] [det] | 9 |
|
