| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has be concerned [prep] | 60 |
|
| 2 | [verb] be concerned about | 26 |
|
| 3 | have be concerned about | 24 |
|
| 4 | has be [adj] about | 12 |
|
| 5 | has be [adj] about | 12 |
|
| 6 | [vb -s] be concerned about | 6 |
|
| 7 | has [be] concerned about | 5 |
|
| 8 | has be concerned about | 5 |
|
