| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [vb mod] be refer to | 19 |
|
| 2 | [Wh det] [vb mod] [be] referred to | 19 |
|
| 3 | [Wh det] [vb mod] be refer to | 19 |
|
| 4 | [Wh det] [vb mod] [be] refer to | 19 |
|
| 5 | which [vb mod] [be] refer to | 16 |
|
| 6 | [Wh det] will [be] refer to | 7 |
|
