| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | they must have [verb] a [noun sg] | 19 |
|
| 2 | they must have [vb pp] a [noun sg] | 19 |
|
| 3 | they must have had a [noun sg] | 8 |
|
| 4 | they must have have a [noun sg] | 8 |
|
| 5 | they must have a [adj] [noun sg] | 10 |
|
| 6 | they must have a [adj] [noun sg] | 9 |
|
| 7 | they must have a [noun sg] [prep] | 8 |
|
| 8 | they must have a [noun sg] [prep] | 8 |
|
