| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it has been [verb] for [adj] | 37 |
|
| 2 | it has been [vb pp] for [adj] | 30 |
|
| 3 | it have been known for [adj] | 14 |
|
| 4 | it [verb] been known for [adj] | 14 |
|
| 5 | it [vb -s] been known for [adj] | 13 |
|
| 6 | it has [be] known for [adj] | 12 |
|
| 7 | it has been known for [adj] | 12 |
|
| 8 | it has [been] known for [adj] | 12 |
|
| 9 | it has been known [prep] [adj] | 12 |
|
| 10 | it has be known for [adj] | 12 |
|
| 11 | it has been know for [adj] | 12 |
|
| 12 | [pron] has been known for [adj] | 12 |
|
| 13 | it has been known [prep] [adj] | 12 |
|
