| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [vb past] [to-vb] | 1280 |
|
| 2 | [vb past] [to-vb] an | 1027 |
|
| 3 | [Wh det] [vb past] an | 435 |
|
| 4 | [Wh det] [to-vb] an | 26 |
|
