| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may have [verb] [art] | 893 |
|
| 2 | [modal v] have had [art] | 771 |
|
| 3 | may have [vb pp] [art] | 767 |
|
| 4 | may have have [art] | 84 |
|
| 5 | may [verb] had [art] | 83 |
|
