| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | was [adv] [verb] at the time | 37 |
|
| 2 | was [adv] [vb pp] at [art] time | 36 |
|
| 3 | was [adv] investigated at [art] time | 5 |
|
| 4 | was widely [verb] at [art] time | 5 |
|
| 5 | was properly [verb] at [art] time | 5 |
|
| 6 | was [adv] investigate at [art] time | 5 |
|
