| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been known for some [noun] | 11 |
|
| 2 | has [been] known for some [noun] | 11 |
|
| 3 | has be known for some [noun] | 11 |
|
| 4 | has [be] known for some [noun sg] | 10 |
|
| 5 | has [be] known for some time | 10 |
|
| 6 | has [be] known for some time | 10 |
|
