| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to be used for [adj] purpose | 11 |
|
| 2 | [prep] be used for [adj] purpose | 11 |
|
| 3 | [prep] be used for [adj] purposes | 7 |
|
| 4 | [prep] be used for [adj] purpose | 6 |
|
| 5 | [prep] be used for [det] purpose | 5 |
|
