| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [not/n't] be [verb] | 548 |
|
| 2 | must [not/n't] be [vb pp] | 544 |
|
| 3 | [modal v] [not/n't] be left | 114 |
|
| 4 | must [adv] be left | 25 |
|
| 5 | must [not/n't] be leave | 15 |
|
| 6 | must [not/n't] be left | 15 |
|
| 7 | must [not/n't] [be] left | 15 |
|
| 8 | must [not/n't] [be] left | 15 |
|
