| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] [noun] | 847 |
|
| 2 | have [been] [noun pl] | 640 |
|
| 3 | [vb base] [been] studies | 8 |
|
| 4 | [verb] [been] studies | 8 |
|
| 5 | have [be] studies | 8 |
|
| 6 | have [been] studies | 8 |
|
| 7 | have [been] study | 8 |
|
