| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be used [prep] the [adj] purpose | 9 |
|
| 2 | [be] used [prep] the [adj] purpose | 9 |
|
| 3 | [be] used [prep] the [adj] purpose | 5 |
|
| 4 | be used [prep] the [adj] purpose | 5 |
|
