| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [verb] [prep] some [noun] | 151 |
|
| 2 | has been [verb] [prep] [adj] study | 33 |
|
| 3 | has be [verb] [prep] some study | 6 |
|
| 4 | has [been] [verb] [prep] some study | 6 |
|
| 5 | [vb -s] been [verb] [prep] some study | 6 |
|
| 6 | have been [verb] [prep] some study | 6 |
|
| 7 | has been [verb] [prep] some study | 6 |
|
| 8 | has [be] [verb] [prep] some study | 6 |
|
| 9 | [verb] been [verb] [prep] some study | 6 |
|
