| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] at the time of | 12 |
|
| 2 | be [v-ing] at the time of | 12 |
|
| 3 | be [v-ing] at the time of | 11 |
|
| 4 | were [v-ing] at the time of | 6 |
|
