| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been used [prep] [adj] [noun] | 200 |
|
| 2 | [be] used [prep] [adj] purpose | 130 |
|
| 3 | be used [prep] [adj] purpose | 130 |
|
| 4 | been [vb pp] [prep] [adj] purpose | 34 |
|
| 5 | been [verb] [prep] [adj] purpose | 34 |
|
| 6 | been used [prep] [adj] purpose | 9 |
|
| 7 | been use [prep] [adj] purpose | 9 |
|
| 8 | [been] used [prep] [adj] purpose | 9 |
|
