| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [vb infin] go | 7 |
|
| 2 | must let [vb infin] | 7 |
|
| 3 | must [vb infin] do | 7 |
|
| 4 | must make [vb infin] | 7 |
|
