| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | was [verb] at the [noun] | 1528 |
|
| 2 | was [v-ing] at the [noun] | 511 |
|
| 3 | was working [prep] the [noun] | 139 |
|
| 4 | was working [prep] the [noun] | 139 |
|
| 5 | be working at the [noun] | 47 |
|
| 6 | [be] working at the [noun] | 47 |
|
| 7 | was working at [art] [noun] | 28 |
|
| 8 | [was/were] working at the [noun] | 26 |
|
| 9 | was work at the [noun] | 21 |
|
| 10 | was working at the [noun] | 21 |
|
