| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they must [vb infin] [prep] the [noun] | 33 |
|
| 2 | they must [verb] [prep] the [noun sg] | 27 |
|
| 3 | they must [verb] to the [noun] | 7 |
|
| 4 | they must [verb] [prep] the [noun pl] | 6 |
|
