| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] been concerned for [det] time | 5 |
|
| 2 | [verb] been concerned for some time | 5 |
|
| 3 | [verb] been concerned for [adj] time | 5 |
|
| 4 | [verb] been concerned for [adj] time | 5 |
|
| 5 | have been concerned for [adj] time | 5 |
|
| 6 | [verb] been concerned for [adj] time | 5 |
|
| 7 | [verb] been concerned for some time | 5 |
|
