| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [vb past] [prep] [det] time | 10 |
|
| 2 | [Wh det] [vb past] [prep] [det] time | 10 |
|
| 3 | [Wh det] [vb past] at [det] time | 5 |
|
| 4 | [Wh det] [vb past] at [det] time | 5 |
|
