| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [verb] [adv] | 1515 |
|
| 2 | must [vb infin] [adv] | 1512 |
|
| 3 | [modal v] become [adv] | 923 |
|
| 4 | must become [adv] | 32 |
|
| 5 | must become [adv] | 31 |
|
