| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may [verb] [art] | 7283 |
|
| 2 | [modal v] require [art] | 621 |
|
| 3 | [vb mod] require [art] | 621 |
|
| 4 | may require [art] | 114 |
|
| 5 | may require [art] | 114 |
|
