| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] be [prep] [det] | 834 |
|
| 2 | must be [prep] [adj] | 168 |
|
| 3 | must [be] [prep] [det] | 48 |
|
| 4 | must [be] [prep] [det] | 48 |
|
| 5 | must be [prep] [det] | 48 |
|
