| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | were [being] [verb] at a | 10 |
|
| 2 | were [be] [vb pp] at a | 10 |
|
| 3 | were be [verb] at a | 10 |
|
| 4 | were being [verb] at a | 10 |
|
