| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [pron] at that time | 34 |
|
| 2 | [verb] [prep] [pron] at that | 24 |
|
| 3 | [verb] [pron] at that time | 14 |
|
| 4 | [verb] [prep] at that time | 7 |
|
