| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [adv] [be] [verb] [prep] | 470 |
|
| 2 | [adv] [be] [verb] [prep] be | 444 |
|
| 3 | must [be] [verb] [prep] be | 71 |
|
| 4 | must [adv] [verb] [prep] be | 8 |
|
