| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | must [vb infin] have a | 90 |
|
| 2 | must [verb] have a | 90 |
|
| 3 | must [verb] had a | 89 |
|
| 4 | must have have a | 89 |
|
| 5 | must have have a | 86 |
|
