| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they must [vb infin] a [adj] [noun sg] | 29 |
|
| 2 | they must [verb] a [adj] [noun sg] | 29 |
|
| 3 | they must have a [adj] [noun sg] | 9 |
|
| 4 | they must have a [adj] [noun sg] | 9 |
|
