| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been some concern | 8 |
|
| 2 | have [been] some concern | 8 |
|
| 3 | have [verb] some concern | 8 |
|
| 4 | have [vb pp] some concern | 8 |
|
| 5 | have [be] some concern | 8 |
|
| 6 | have be some concern | 8 |
|
| 7 | have caused some concern | 5 |
|
| 8 | have cause some concern | 5 |
|
