| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [pron] must [verb] [is] | 17 |
|
| 2 | question [pron] [vb mod] [verb] [is] | 14 |
|
| 3 | question [pron] [modal v] [verb] [is] | 14 |
|
| 4 | question [pron] must [verb] [is] | 6 |
|
| 5 | question [pron] must [verb] [be] | 6 |
|
