| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they must have have a [noun sg] | 8 |
|
| 2 | they must have had a [noun] | 8 |
|
| 3 | they must have have a [noun] | 8 |
|
| 4 | they must have have a [noun] | 8 |
|
