| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been used [prep] some | 15 |
|
| 2 | has been used [prep] some | 7 |
|
| 3 | [vb -s] been used [prep] some | 7 |
|
| 4 | [vb base] been used [prep] some | 6 |
|
| 5 | [verb] been used in some | 6 |
|
| 6 | have been used [prep] some | 6 |
|
