| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [v-ing] at the time | 84 |
|
| 2 | [was/were] [v-ing] at the time | 65 |
|
| 3 | was [v-ing] at the time | 43 |
|
| 4 | were [v-ing] at the time | 22 |
|
| 5 | [be] doing at the time | 11 |
|
| 6 | [be] working at the time | 9 |
|
| 7 | [be] happening at the time | 7 |
|
| 8 | [am/are] [v-ing] at the time | 6 |
|
| 9 | [be] living at the time | 6 |
|
| 10 | [is] [v-ing] at the time | 5 |
|
| 11 | [be] going at the time | 5 |
|
