| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [adv] [verb] at the time | 74 |
|
| 2 | [was/were] [adv] [vb pp] at the time | 67 |
|
| 3 | was [adv] [verb] at the time | 54 |
|
| 4 | [was/were] [adv] [verb] at the time | 51 |
|
| 5 | [was/were] [not/n't] [verb] at the time | 23 |
|
| 6 | [was/were] not [verb] at the time | 23 |
|
| 7 | were [adv] [verb] at the time | 20 |
|
| 8 | [was/were] not [verb] at the time | 17 |
|
| 9 | [was/were] widely [verb] at the time | 7 |
|
| 10 | [was/were] widely [verb] at the time | 7 |
|
| 11 | [was/were] [adv] [v-ing] at the time | 7 |
|
| 12 | [was/were] n't [verb] at the time | 6 |
|
| 13 | [was/were] properly [verb] at the time | 5 |
|
| 14 | [was/were] properly [verb] at the time | 5 |
|
| 15 | [was/were] [adv] investigate at the time | 5 |
|
| 16 | [was/were] [adv] investigated at the time | 5 |
|
