| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may [verb] for [art] | 198 |
|
| 2 | may [vb infin] for [art] | 198 |
|
| 3 | may require [prep] [art] | 10 |
|
| 4 | [modal v] require for [art] | 9 |
|
| 5 | may require for [art] | 8 |
|
| 6 | may require for [art] | 8 |
|
