| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb -s] been [vb pp] for some | 43 |
|
| 2 | has [been] [vb pp] for some | 39 |
|
| 3 | [vb -s] [been] known for some | 12 |
|
| 4 | [vb -s] [been] recognised for some | 5 |
|
