| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may [vb infin] [been] [vb pp] | 987 |
|
| 2 | [vb infin] [been] [adv] [vb pp] | 429 |
|
| 3 | may [vb infin] [been] [adv] | 279 |
|
| 4 | may [vb infin] [adv] [vb pp] | 158 |
|
