| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | was [v-ing] [prep] [art] | 6938 |
|
| 2 | was [verb] at [art] | 2555 |
|
| 3 | be [v-ing] at [art] | 2298 |
|
| 4 | [be] [v-ing] at [art] | 2298 |
|
| 5 | [was/were] [v-ing] at [art] | 1028 |
|
