| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [vb pp] [to-vb] [adj] | 1356 |
|
| 2 | which is [vb pp] [to-vb] | 568 |
|
| 3 | which is [vb pp] [adj] | 100 |
|
| 4 | which is [to-vb] [adj] | 41 |
|
