| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [vb pp] that [det] | 950 |
|
| 2 | it must be [vb pp] that | 586 |
|
| 3 | must be [vb pp] that [det] | 87 |
|
| 4 | it must be [vb pp] [det] | 10 |
|
