| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been used [prep] [adj] | 64 |
|
| 2 | not been used [prep] [adj] | 16 |
|
| 3 | have not been [prep] [adj] | 12 |
|
| 4 | have not been used [prep] | 11 |
|
