| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pron] must be [vb pp] | 2574 |
|
| 2 | must [adv] be [vb pp] | 1540 |
|
| 3 | [pron] must [adv] be | 936 |
|
| 4 | [pron] [adv] be [vb pp] | 147 |
|
