| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [v-ing] at the [noun] | 658 |
|
| 2 | [was/were] [verb] at the time | 209 |
|
| 3 | [be] [v-ing] at the time | 85 |
|
| 4 | [was/were] [v-ing] [prep] the time | 73 |
|
| 5 | [was/were] [v-ing] at [art] time | 72 |
|
| 6 | [was/were] [v-ing] at [art] time | 72 |
|
| 7 | [was/were] [v-ing] at the time | 66 |
|
