| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | this [noun sg] must [not/n't] be | 21 |
|
| 2 | this [noun] must [not/n't] be | 21 |
|
| 3 | this must [not/n't] be [verb] | 16 |
|
| 4 | this must [not/n't] be [vb pp] | 16 |
|
