| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has [been] some [noun] | 140 |
|
| 2 | has [been] [adj] concern | 23 |
|
| 3 | [verb] [been] some concern | 8 |
|
| 4 | have [been] some concern | 8 |
|
| 5 | has [been] [det] concern | 6 |
|
| 6 | [vb -s] [been] some concern | 6 |
|
| 7 | has [be] some concern | 5 |
|
| 8 | has [been] some concern | 5 |
|
