| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] has [adv] [been] concerned [prep] | 6 |
|
| 2 | [noun sg] has [adv] [been] concerned [prep] | 5 |
|
| 3 | has [adv] [been] [adv] concerned [prep] | 5 |
|
| 4 | has [adv] [been] [adv] concerned [prep] | 5 |
|
