| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | it may [vb infin] | 2991 |
|
| 2 | may [not/n't] [vb infin] | 2830 |
|
| 3 | it may [not/n't] | 654 |
|
| 4 | it [not/n't] [vb infin] | 111 |
|
