| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it must [adv] [vb infin] | 143 |
|
| 2 | must [adv] [vb infin] [noun sg] | 134 |
|
| 3 | it must [vb infin] [noun sg] | 39 |
|
| 4 | it [adv] [vb infin] [noun sg] | 16 |
|
