| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be [verb] [adv] [subord] [to-vb] | 200 |
|
| 2 | must be [verb] [adv] [to-vb] | 79 |
|
| 3 | must be [verb] [adv] [subord] | 62 |
|
