| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | was [adv] [vb pp] at the time | 35 |
|
| 2 | were [adv] [vb pp] at the time | 14 |
|
| 3 | be widely [vb pp] at the time | 7 |
|
| 4 | be [adv] investigated at the time | 6 |
|
| 5 | be properly [vb pp] at the time | 5 |
|
| 6 | been [adv] [vb pp] at the time | 5 |
|
