| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] at that time | 56 |
|
| 2 | was [vb pp] at that time | 18 |
|
| 3 | be [vb pp] at that time | 12 |
|
| 4 | were [vb pp] at that time | 10 |
|
| 5 | been [vb pp] at that time | 8 |
|
| 6 | be known at that time | 5 |
|
| 7 | being [vb pp] at that time | 5 |
|
