| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may have [verb] | 4884 |
|
| 2 | may have [vb pp] | 4126 |
|
| 3 | [modal v] have noticed | 233 |
|
| 4 | may [vb infin] noticed | 60 |
|
| 5 | may have noticed | 60 |
|
| 6 | may [verb] noticed | 60 |
|
| 7 | may have notice | 60 |
|
