| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [verb] must be | 10 |
|
| 2 | have [verb] must be | 10 |
|
| 3 | have [verb] must [be] | 10 |
|
| 4 | have [vb pp] must [be] | 8 |
|
