| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] have been used as [noun] | 10 |
|
| 2 | [noun] have [been] used as [noun] | 10 |
|
| 3 | [noun pl] have [been] used as [noun] | 8 |
|
| 4 | [noun] have [been] used as [noun pl] | 5 |
|
