| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb base] been used [prep] [adj] | 70 |
|
| 2 | not been used [prep] [adj] | 16 |
|
| 3 | [vb base] not been [prep] [adj] | 14 |
|
| 4 | [vb base] not been used [prep] | 11 |
|
