| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | has been [vb pp] a | 372 |
|
| 2 | [Wh pn] has been [vb pp] | 338 |
|
| 3 | [Wh pn] has [vb pp] a | 247 |
|
| 4 | [Wh pn] has been a | 31 |
|
