| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [verb] at a | 2102 |
|
| 2 | were [verb] at a | 222 |
|
| 3 | were [be] [verb] at | 76 |
|
| 4 | were [be] [verb] a | 10 |
|
