| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [Wh det] be [noun] | 2587 |
|
| 2 | [Wh det] must be | 702 |
|
| 3 | must be [noun] | 681 |
|
| 4 | [Wh det] must [noun] | 5 |
|
