| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must not be [verb] | 520 |
|
| 2 | must not be [vb pp] | 517 |
|
| 3 | [modal v] not be forgotten | 100 |
|
| 4 | must [adv] be forgotten | 42 |
|
| 5 | must not [be] forgotten | 34 |
|
| 6 | must not [be] forgotten | 34 |
|
| 7 | must not be forget | 34 |
|
| 8 | must not be forgotten | 34 |
|
| 9 | must not be forgotten | 34 |
|
| 10 | must [not/n't] be forgotten | 34 |
|
