| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [verb] for some | 55 |
|
| 2 | has been [vb pp] for some | 39 |
|
| 3 | have been known for some | 20 |
|
| 4 | [verb] been known for some | 20 |
|
| 5 | has been known for [adj] | 16 |
|
| 6 | has been known for [det] | 16 |
|
| 7 | [vb -s] been known for some | 12 |
|
| 8 | has [been] known for some | 11 |
|
| 9 | has been known [prep] some | 11 |
|
| 10 | has been know for some | 11 |
|
| 11 | has [be] known for some | 11 |
|
| 12 | has be known for some | 11 |
|
| 13 | has been known for some | 11 |
|
| 14 | has been known for some | 11 |
|
| 15 | has been known [prep] some | 11 |
|
