| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [verb] [prep] [be] | 20281 |
|
| 2 | must [be] [verb] [prep] | 5097 |
|
| 3 | must [verb] [prep] [be] | 88 |
|
| 4 | must [be] [verb] [be] | 43 |
|
| 5 | must [be] [prep] [be] | 10 |
|
