| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [vb infin] [prep] [adv] | 187 |
|
| 2 | must [verb] [prep] [adv] | 187 |
|
| 3 | [modal v] have [prep] [adv] | 175 |
|
| 4 | must have [prep] [adv] | 38 |
|
| 5 | must have [prep] [adv] | 38 |
|
