| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | may require for [art] purpose | 7 |
|
| 2 | may require for [art] purpose | 7 |
|
| 3 | [vb mod] require for [art] purpose | 7 |
|
| 4 | [modal v] require for [art] purpose | 7 |
|
| 5 | require for [art] purpose [prep] | 15 |
|
| 6 | require for [art] purpose [prep] | 15 |
|
| 7 | require for [art] purpose of | 14 |
|
| 8 | require for [art] purpose of | 14 |
|
