| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | what [was/were] [vb pp] at [art] time | 8 |
|
| 2 | what [was/were] [vb pp] at [art] time | 8 |
|
| 3 | what was [vb pp] at [art] time | 8 |
|
| 4 | what [was/were] [vb pp] at the time | 8 |
|
| 5 | what [was/were] [vb pp] at the time | 8 |
|
