| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | who have been [vb pp] [det] | 11 |
|
| 2 | [Wh pn] have been [vb pp] several | 5 |
|
| 3 | [Wh pn] has been [vb pp] [det] | 5 |
|
