| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been established [prep] some | 7 |
|
| 2 | have [be] established [prep] some | 7 |
|
| 3 | have [been] established [prep] some | 7 |
|
| 4 | have be established [prep] some | 7 |
|
