| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [adv] have [verb] | 11300 |
|
| 2 | [modal v] [adv] have [verb] | 11300 |
|
| 3 | may [adv] [verb] [verb] | 1765 |
|
| 4 | may [adv] have [verb] | 1181 |
|
