| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] must [be] [verb] to | 110 |
|
| 2 | [pron] [vb mod] [be] refer to | 56 |
|
| 3 | [pron] [modal v] [be] refer to | 56 |
|
| 4 | [pron] must [be] refer [prep] | 7 |
|
| 5 | [pron] must [be] refer [prep] | 7 |
|
| 6 | [pron] must [be] refer to | 6 |
|
| 7 | [pron] must [be] refer to | 6 |
|
| 8 | [pron] must [be] refer to | 6 |
|
