| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] must be [vb pp] | 2099 |
|
| 2 | must [not/n't] be [vb pp] | 544 |
|
| 3 | [noun pl] must [not/n't] be | 99 |
|
| 4 | [noun pl] [not/n't] be [vb pp] | 10 |
|
