| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [verb] on a | 1332 |
|
| 2 | which [was/were] [verb] on | 300 |
|
| 3 | which [was/were] [verb] a | 169 |
|
| 4 | which [verb] on a | 110 |
|
| 5 | which [was/were] on a | 7 |
|
