| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh pn] used to work [prep] | 22 |
|
| 2 | who used work [prep] | 22 |
|
| 3 | [Wh pn] used work for | 10 |
|
| 4 | [Wh pn] used work with | 5 |
|
