| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb mod] [adv] have [be] | 4609 |
|
| 2 | [modal v] [adv] have [be] | 4609 |
|
| 3 | may [adv] [verb] [be] | 782 |
|
| 4 | may [adv] have [be] | 769 |
|
