| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] been concerned [prep] [det] [noun] | 15 |
|
| 2 | have been concerned [prep] [det] [noun] | 15 |
|
| 3 | [vb -s] been concerned [prep] [det] [noun] | 7 |
|
| 4 | has been concerned [prep] [det] [noun] | 7 |
|
| 5 | [vb base] been concerned [prep] [det] [noun] | 7 |
|
| 6 | have been concerned [prep] [det] [noun] | 6 |
|
| 7 | been concerned [prep] [det] [noun] [prep] | 8 |
|
| 8 | been concerned [prep] [det] [noun] [prep] | 8 |
|
