| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [verb] [prep] [adj] [noun] | 1840 |
|
| 2 | have been [verb] [prep] [adj] [noun sg] | 790 |
|
| 3 | [verb] been [verb] [prep] [adj] research | 23 |
|
| 4 | have been [verb] [prep] [adj] research | 23 |
|
| 5 | [vb base] been [verb] [prep] [adj] research | 13 |
|
| 6 | have been [verb] [prep] [adj] research | 13 |
|
| 7 | have [been] [verb] [prep] [adj] research | 13 |
|
| 8 | have be [verb] [prep] [adj] research | 13 |
|
| 9 | have [be] [verb] [prep] [adj] research | 13 |
|
