| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [vb infin] up the | 25 |
|
| 2 | must [vb infin] out the | 25 |
|
| 3 | must keep [adv prt] the | 5 |
|
| 4 | must [vb infin] back the | 5 |
|
| 5 | must [vb infin] down the | 5 |
|
