| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have [vb pp] a [noun] | 188 |
|
| 2 | have [vb pp] a [noun] [verb] | 104 |
|
| 3 | must have [vb pp] [noun] [verb] | 13 |
|
| 4 | must have a [noun] [verb] | 12 |
|
