| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [vb pp] for six months | 9 |
|
| 2 | [verb] been [vb pp] for six months | 9 |
|
| 3 | has been [vb pp] for six months | 8 |
|
| 4 | [vb -s] been [vb pp] for six months | 8 |
|
