| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [prep] a [noun] | 482 |
|
| 2 | have been treated [prep] [noun] | 49 |
|
| 3 | have been treated [prep] a | 29 |
|
| 4 | been treated [prep] a [noun] | 16 |
|
