| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been used [prep] [noun pl] | 69 |
|
| 2 | have been [prep] some [noun pl] | 19 |
|
| 3 | have been used [prep] some | 15 |
|
| 4 | been used [prep] some [noun pl] | 8 |
|
