| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been used [prep] | 217 |
|
| 2 | have been [adv] [prep] | 123 |
|
| 3 | been [adv] used [prep] | 72 |
|
| 4 | have been [adv] used | 39 |
|
