| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may [be] refer to | 46 |
|
| 2 | [adv] [be] refer to | 44 |
|
| 3 | may [adv] refer to | 9 |
|
| 4 | may [adv] [be] refer | 8 |
|
