| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must not be [vb pp] that | 29 |
|
| 2 | must [not/n't] be [vb pp] that | 29 |
|
| 3 | must [not/n't] be forgotten that | 12 |
|
| 4 | must [not/n't] be assumed that | 8 |
|
| 5 | must [not/n't] be thought that | 6 |
|
