| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [v-ing] [prep] [art] | 9647 |
|
| 2 | [was/were] [v-ing] [prep] [art] | 9645 |
|
| 3 | [was/were] [verb] at [art] | 3597 |
|
| 4 | [be] [v-ing] at [art] | 2298 |
|
| 5 | [was/were] [v-ing] at [art] | 1028 |
|
| 6 | [was/were] [v-ing] at [art] | 1028 |
|
