| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it [vb past] [been] [prep] [adj] | 61 |
|
| 2 | [Wh det] it [vb past] [prep] [adj] | 37 |
|
| 3 | [Wh det] it [vb past] [been] [prep] | 31 |
|
| 4 | [Wh det] [vb past] [been] [prep] [adj] | 10 |
|
