| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | which can be [vb pp] [verb] [adj] | 33 |
|
| 2 | which can [be] [vb pp] [to-vb] [adj] | 32 |
|
| 3 | which can [be] used [verb] [adj] | 20 |
|
