| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | we have be [adv] concerned [prep] | 5 |
|
| 2 | we have be [adv] concerned [prep] | 5 |
|
| 3 | we have be [adv] concerned [prep] | 5 |
|
| 4 | we have been [adv] concerned [prep] | 5 |
|
