| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been concerned for [det] [noun] | 6 |
|
| 2 | [been] concerned for some [noun] | 6 |
|
| 3 | [been] concerned for [det] [noun sg] | 5 |
|
| 4 | [been] concerned for [det] time | 5 |
|
| 5 | [been] concerned for [det] time | 5 |
|
