| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [is] [verb] [be] | 1286 |
|
| 2 | [verb] must [be] | 366 |
|
| 3 | [is] [verb] must | 44 |
|
| 4 | [is] must [be] | 15 |
|
