| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it have been [verb] [prep] [noun] | 475 |
|
| 2 | it have been [vb pp] [prep] [noun] | 441 |
|
| 3 | it [verb] been known [prep] [noun] | 13 |
|
| 4 | it have been known [prep] [noun] | 13 |
|
| 5 | [pers pn] have been known [prep] [noun] | 13 |
|
| 6 | [pron] have been known [prep] [noun] | 13 |
|
| 7 | it have been know [prep] [noun] | 13 |
|
| 8 | it have [be] known [prep] [noun] | 13 |
|
| 9 | it have [been] known [prep] [noun] | 13 |
|
| 10 | it have be known [prep] [noun] | 13 |
|
