| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may [adv] have [vb pp] [verb] | 30 |
|
| 2 | may [adv] have [vb pp] [verb] | 30 |
|
| 3 | may [adv] have [vb pp] [to-vb] | 24 |
|
| 4 | may well have [vb pp] [verb] | 10 |
|
| 5 | may [adv] have begun [verb] | 6 |
|
