| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may [be] [verb] | 16299 |
|
| 2 | may [be] [vb pp] | 14926 |
|
| 3 | [modal v] [be] used | 6356 |
|
| 4 | [vb mod] [be] used | 6356 |
|
| 5 | may [be] use | 719 |
|
| 6 | may [be] used | 693 |
|
