| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] must [be] | 11000 |
|
| 2 | question [modal v] [be] | 438 |
|
| 3 | question [vb mod] [be] | 438 |
|
| 4 | question must [be] | 71 |
|
