| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] [adv] [adv] [to-vb] | 340 |
|
| 2 | must [vb infin] [adv] [adv] | 300 |
|
| 3 | must [vb infin] [adv] [to-vb] | 115 |
|
