| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [vb past] at the [adj] time | 5 |
|
| 2 | [Wh det] [vb past] at the same time | 5 |
|
| 3 | [Wh det] [vb past] at the same time | 5 |
|
| 4 | [Wh det] [vb past] at the [det] time | 5 |
|
