| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have had a [noun] [prep] | 20 |
|
| 2 | must have have a [noun sg] [prep] | 20 |
|
| 3 | must have have a [noun] of | 7 |
|
| 4 | must have have a [noun] in | 6 |
|
