| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have a | 7207 |
|
| 2 | [vb mod] have a | 7207 |
|
| 3 | must [verb] a | 1657 |
|
| 4 | must [vb infin] a | 1657 |
|
| 5 | must have [art] | 753 |
|
| 6 | must have [art] | 753 |
|
| 7 | must have a | 578 |
|
| 8 | must have a | 503 |
|
| 9 | must have a | 503 |
|
