| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] at the time when | 45 |
|
| 2 | [vb pp] at the time [Wh adv] | 26 |
|
| 3 | [vb infin] at the time [Wh adv] | 7 |
|
| 4 | [vb past] at the time [Wh adv] | 7 |
|
