| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [been] [verb] [prep] | 18310 |
|
| 2 | [Wh det] [vb past] [been] [verb] | 2235 |
|
| 3 | [Wh det] [vb past] [verb] [prep] | 1898 |
|
| 4 | [Wh det] [vb past] [been] [prep] | 128 |
|
