| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [v-ing] [prep] [det] | 1002 |
|
| 2 | [was/were] [v-ing] [prep] [det] | 1002 |
|
| 3 | [was/were] [verb] at [det] | 396 |
|
| 4 | [be] [v-ing] at [det] | 392 |
|
| 5 | [was/were] [v-ing] at [adj] | 268 |
|
| 6 | [was/were] [v-ing] at [det] | 125 |
|
