| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [verb] [prep] | 171100 |
|
| 2 | [was/were] [v-ing] [prep] | 26019 |
|
| 3 | [be] working [prep] | 2922 |
|
| 4 | [was/were] work [prep] | 971 |
|
| 5 | [was/were] working [prep] | 901 |
|
