| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [v-ing] at [adj] time | 24 |
|
| 2 | [was/were] [v-ing] at [det] time | 23 |
|
| 3 | was [v-ing] at [adj] time | 20 |
|
| 4 | [was/were] [v-ing] at that time | 16 |
|
| 5 | [was/were] [v-ing] at that time | 16 |
|
| 6 | [was/were] [v-ing] at this time | 6 |
|
| 7 | [was/were] [v-ing] at this time | 6 |
|
| 8 | [was/were] doing at [adj] time | 5 |
|
| 9 | were [v-ing] at [adj] time | 5 |
|
