| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] used [prep] | 210 |
|
| 2 | be [Wh det] [prep] | 50 |
|
| 3 | be used [prep] | 15 |
|
| 4 | be [Wh det] used | 11 |
|
