| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [be] refer to | 257 |
|
| 2 | which [vb mod] [be] refer | 16 |
|
| 3 | which [vb mod] [be] to | 15 |
|
| 4 | which [vb mod] refer to | 6 |
|
