| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [verb] [prep] [pron] at | 111 |
|
| 2 | [verb] [prep] [pron] at a | 78 |
|
| 3 | [was/were] [verb] [prep] [pron] a | 27 |
|
| 4 | [was/were] [verb] [pron] at a | 10 |
|
