| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] concerned [prep] some | 8 |
|
| 2 | [verb] [been] concerned [prep] some | 8 |
|
| 3 | [verb] been concerned [prep] some | 8 |
|
| 4 | [verb] [been] concerned for some | 6 |
|
| 5 | [verb] [been] concerned for some | 6 |
|
