| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | when they were [prep] | 121 |
|
| 2 | when they [was/were] in | 55 |
|
| 3 | when they [was/were] at | 23 |
|
| 4 | when they [was/were] on | 21 |
|
