| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [verb] at the time | 209 |
|
| 2 | [was/were] [v-ing] at the time | 66 |
|
| 3 | [was/were] happening at the [noun] | 11 |
|
| 4 | [was/were] happening at [art] time | 8 |
|
| 5 | [be] happening at the time | 7 |
|
| 6 | [was/were] happening at the time | 5 |
|
| 7 | [was/were] happen at the time | 5 |
|
| 8 | [was/were] happening [prep] the time | 5 |
|
| 9 | [was/were] happening [prep] the time | 5 |
|
