| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [been] [adv] used [prep] | 66 |
|
| 2 | [Wh det] have [been] used [prep] | 61 |
|
| 3 | [Wh det] have [been] [adv] [prep] | 14 |
|
| 4 | [Wh det] have [been] [adv] used | 7 |
|
