| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] be used for [adj] [noun pl] | 12 |
|
| 2 | [vb past] been used for [adj] [noun] | 12 |
|
| 3 | had be used for [adj] [noun] | 12 |
|
| 4 | [vb past] be used for [adj] [noun] | 7 |
|
