| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] at the same time | 140 |
|
| 2 | was [v-ing] at the time | 43 |
|
| 3 | was at the same time | 30 |
|
| 4 | was [v-ing] at the same | 12 |
|
