| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may require [prep] [be] | 6 |
|
| 2 | may require [prep] be | 6 |
|
| 3 | may require [prep] [be] | 6 |
|
| 4 | may require [prep] be | 6 |
|
| 5 | may require to [be] | 6 |
|
