| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [vb infin] [conj] [verb] | 360 |
|
| 2 | [vb infin] [prep] [conj] [verb] | 183 |
|
| 3 | must [vb infin] [prep] [verb] | 113 |
|
| 4 | must [vb infin] [prep] [conj] | 27 |
|
