| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must not be [adj] than | 11 |
|
| 2 | must [not/n't] be [adj -er] than | 10 |
|
| 3 | must [not/n't] be later than | 5 |
|
| 4 | must [not/n't] be late than | 5 |
|
