| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] at [det] time | 195 |
|
| 2 | [was/were] [v-ing] at [det] | 125 |
|
| 3 | [v-ing] at [det] time | 87 |
|
| 4 | [was/were] [v-ing] [det] time | 12 |
|
