| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] [been] concerned [prep] [det] | 7 |
|
| 2 | [vb base] been concerned [prep] [det] | 7 |
|
| 3 | [vb base] be concerned [prep] [det] | 7 |
|
| 4 | [vb base] [be] concerned [prep] [det] | 7 |
|
| 5 | have [be] concerned [prep] [det] | 6 |
|
