| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [modal v] only [be] used | 186 |
|
| 2 | may [adv] [be] used | 134 |
|
| 3 | may only [be] [verb] | 127 |
|
| 4 | may only [be] [vb pp] | 125 |
|
| 5 | may only [be] used | 18 |
|
| 6 | may only [be] use | 18 |
|
