| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] [was/were] [verb] at a | 197 |
|
| 2 | [was/were] [verb] at a time | 48 |
|
| 3 | [pron] [verb] at a time | 31 |
|
| 4 | [pron] [was/were] at a time | 7 |
|
