| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they have [vb pp] [noun] | 1537 |
|
| 2 | they must have [vb pp] | 286 |
|
| 3 | must have [vb pp] [noun] | 262 |
|
| 4 | they must have [noun] | 15 |
|
