| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] have had a | 454 |
|
| 2 | must have [vb pp] a | 342 |
|
| 3 | must have [verb] a | 342 |
|
| 4 | must have had [art] | 117 |
|
| 5 | must have had [art] | 117 |
|
| 6 | must have had a | 98 |
|
| 7 | must [vb infin] had a | 89 |
|
| 8 | must [verb] had a | 89 |
|
| 9 | must have had a | 89 |
|
| 10 | must have have a | 86 |
|
