| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] [vb mod] be [verb] to | 502 |
|
| 2 | [pron] [vb mod] be refer to | 56 |
|
| 3 | [Wh det] [modal v] be refer to | 19 |
|
| 4 | [Wh det] [vb mod] [be] refer to | 19 |
|
| 5 | [Wh det] [vb mod] be refer [prep] | 19 |
|
