| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [Wh pn] at that time [verb] | 5 |
|
| 2 | [Wh pn] [be] at that time [verb] | 5 |
|
| 3 | [Wh pn] [was/were] at that time [verb] | 5 |
|
| 4 | [Wh pn] be at that time [verb] | 5 |
|
