| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] working at the [noun] | 26 |
|
| 2 | [was/were] working at the [noun sg] | 21 |
|
| 3 | was working at the [noun] | 21 |
|
| 4 | [was/were] working at the time | 8 |
|
| 5 | [was/were] working at the time | 8 |
|
| 6 | were working at the [noun] | 5 |
|
