| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may [adv] have [verb] [prep] | 230 |
|
| 2 | may [adv] have [vb pp] [prep] | 209 |
|
| 3 | [modal v] [adv] have heard [prep] | 27 |
|
| 4 | [vb mod] [adv] have heard [prep] | 27 |
|
| 5 | may [adv] have hear [prep] | 9 |
|
| 6 | may [adv] [verb] heard [prep] | 9 |
|
| 7 | may [adv] have heard [prep] | 9 |
|
