| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [vb pp] [prep] some time | 27 |
|
| 2 | has [been] [vb pp] for some time | 25 |
|
| 3 | has [been] known [prep] some time | 10 |
|
| 4 | has [been] recognised [prep] some time | 5 |
|
