| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may have [verb] | 4884 |
|
| 2 | [modal v] have know | 706 |
|
| 3 | [vb mod] have know | 706 |
|
| 4 | may [vb infin] know | 53 |
|
| 5 | may [verb] know | 53 |
|
| 6 | may have know | 13 |
|
| 7 | may have know | 13 |
|
