| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it be [prep] [noun sg] [to-vb] | 54 |
|
| 2 | it must be [prep] [noun sg] | 19 |
|
| 3 | must be [prep] [noun sg] [to-vb] | 15 |
|
| 4 | it must be [prep] [to-vb] | 9 |
|
