| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [v-ing] at [det] time | 23 |
|
| 2 | was [v-ing] at [adj] time | 19 |
|
| 3 | [was/were] [v-ing] at that time | 16 |
|
| 4 | [was/were] [v-ing] at that time | 16 |
|
| 5 | [was/were] [v-ing] at this time | 6 |
|
| 6 | [was/were] [v-ing] at this time | 6 |
|
| 7 | were [v-ing] at [adj] time | 5 |
|
