| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [adv] investigated at the time | 5 |
|
| 2 | [was/were] properly investigated at the time | 5 |
|
| 3 | [was/were] [adv] investigated at the time | 5 |
|
| 4 | was [adv] investigated at the time | 5 |
|
| 5 | [was/were] properly investigated at the time | 5 |
|
