| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | was [v-ing] at [det] time | 19 |
|
| 2 | be [v-ing] at that time | 19 |
|
| 3 | be [v-ing] at this time | 8 |
|
| 4 | be doing at [det] time | 7 |
|
| 5 | be happening at [det] time | 5 |
|
