| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [verb] [adv] | 2821 |
|
| 2 | must [vb infin] [adv] | 2818 |
|
| 3 | [modal v] do [adv] | 2155 |
|
| 4 | [vb mod] do [adv] | 2155 |
|
| 5 | must do [adv] | 94 |
|
| 6 | must do [adv] | 93 |
|
