| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] going on at [art] time | 5 |
|
| 2 | [was/were] [verb] on at the time | 5 |
|
| 3 | was [verb] on at [art] time | 5 |
|
| 4 | [was/were] [v-ing] on at [art] time | 5 |
|
| 5 | [was/were] go on at [art] time | 5 |
|
| 6 | [was/were] [verb] on at [art] time | 5 |
|
