| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [noun sg] must have [verb] a | 7 |
|
| 2 | [noun] [noun sg] must have [vb pp] a | 7 |
|
| 3 | [noun] [noun sg] must have have a | 5 |
|
| 4 | [noun] [noun sg] must have had a | 5 |
|
