| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when it be [vb pp] on | 28 |
|
| 2 | when it be [vb pp] on | 28 |
|
| 3 | when it was [vb pp] on | 15 |
|
| 4 | when it is [vb pp] on | 11 |
|
