| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which [was/were] [verb] [adj] [noun] | 225 |
|
| 2 | [was/were] used [verb] [adj] [noun] | 102 |
|
| 3 | which [was/were] used [verb] [noun] | 19 |
|
| 4 | which [was/were] used [verb] [adj] | 6 |
|
