| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [vb -s] often [be] [vb pp] | 14 |
|
| 2 | [Wh det] [vb -s] often be [vb pp] | 14 |
|
| 3 | [Wh det] [vb -s] often been [vb pp] | 13 |
|
| 4 | [Wh det] [vb -s] often [been] [vb pp] | 13 |
|
