| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may be [vb pp] [adv] [to-vb] | 30 |
|
| 2 | may be [vb pp] [adv] [to-vb] | 30 |
|
| 3 | may [be] [vb pp] [adv] [to-vb] | 30 |
|
| 4 | may [be] used [adv] [to-vb] | 9 |
|
