| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | you must [vb infin] [verb] a [noun sg] | 18 |
|
| 2 | you must [vb infin] [verb] a [noun] | 18 |
|
| 3 | you must [vb infin] [vb pp] a [noun] | 17 |
|
| 4 | you must have [verb] a [noun] | 17 |
|
