| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have [verb] [adv] | 316 |
|
| 2 | [modal v] have change [adv] | 23 |
|
| 3 | must have change [adv] | 8 |
|
| 4 | must have change [adv] | 7 |
|
| 5 | must [vb infin] change [adv] | 7 |
|
| 6 | must [verb] change [adv] | 7 |
|
