| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] it must be | 234 |
|
| 2 | it must be [prep] | 189 |
|
| 3 | [verb] must be [prep] | 18 |
|
| 4 | [verb] it must [prep] | 8 |
|
| 5 | [verb] it be [prep] | 7 |
|
