| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [noun] have been concerned | 8 |
|
| 2 | [prep] [noun] have [been] concerned | 8 |
|
| 3 | [prep] [noun] have be concerned | 8 |
|
| 4 | [prep] [noun] has [be] concerned | 6 |
|
| 5 | [prep] [noun sg] have [be] concerned | 6 |
|
