| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must have have a [noun] | 50 |
|
| 2 | must have had a [noun] | 50 |
|
| 3 | must have have a [noun sg] | 49 |
|
| 4 | must have have a reason | 6 |
|
| 5 | must have have a reason | 6 |
|
