| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [prep] [adj] | 1750 |
|
| 2 | have been used [prep] | 854 |
|
| 3 | been used [prep] [adj] | 269 |
|
| 4 | have used [prep] [adj] | 20 |
|
| 5 | have been used [adj] | 11 |
|
