| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have [vb pp] a [noun] | 22706 |
|
| 2 | must have [vb pp] a | 398 |
|
| 3 | must have a [noun] | 284 |
|
| 4 | must have [vb pp] [noun] | 262 |
|
