| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been used [prep] [noun sg] | 36 |
|
| 2 | have been used [prep] [noun pl] | 25 |
|
| 3 | have been used in [noun] | 23 |
|
| 4 | have been used for [noun] | 22 |
|
| 5 | have been used as [noun] | 13 |
|
| 6 | have been used by [noun] | 9 |
|
| 7 | have been used [prep] [noun prp] | 7 |
|
