| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [Wh det] [vb past] [prep] | 1047 |
|
| 2 | [prep] [Wh det] be [prep] | 713 |
|
| 3 | [prep] [Wh det] [vb past] be | 310 |
|
| 4 | [Wh det] [vb past] be [prep] | 137 |
|
