| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it must [vb infin] [prep] the [noun] | 35 |
|
| 2 | it must [vb infin] [prep] the [noun sg] | 21 |
|
| 3 | it must [vb infin] to the [noun] | 12 |
|
| 4 | it must [vb infin] [prep] the [noun pl] | 11 |
|
