| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [vb pp] on at | 17 |
|
| 2 | was [vb pp] on at | 9 |
|
| 3 | been [vb pp] on at | 7 |
|
| 4 | be switched on at | 7 |
|
| 5 | be carried on at | 6 |
|
| 6 | is [vb pp] on at | 5 |
|
| 7 | be put on at | 5 |
|
