| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] [vb infin] if it [be] [verb] | 23 |
|
| 2 | must [vb infin] if [pron] [be] [verb] | 21 |
|
| 3 | must [vb infin] [conj] it [be] [verb] | 13 |
|
| 4 | must [verb] if it [be] [verb] | 7 |
|
