| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] to [be] [prep] | 751 |
|
| 2 | to [be] concerned [prep] | 124 |
|
| 3 | [vb -s] [be] concerned [prep] | 63 |
|
| 4 | [vb -s] to [be] concerned | 18 |
|
