| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] at [det] time be | 19 |
|
| 2 | [vb past] at [det] time [was/were] | 13 |
|
| 3 | [vb past] at [det] time was | 9 |
|
| 4 | [vb past] at that time [be] | 9 |
|
| 5 | [vb past] at this time [be] | 8 |
|
