| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [am/are] used [prep] [adj] [noun] | 146 |
|
| 2 | [be] used [prep] [adj] purpose | 61 |
|
| 3 | [am/are] [vb pp] [prep] [adj] purpose | 31 |
|
| 4 | [am/are] [verb] [prep] [adj] purpose | 31 |
|
| 5 | [am/are] used [prep] [adj] purpose | 17 |
|
| 6 | [am/are] used [prep] [adj] purpose | 9 |
|
| 7 | [am/are] use [prep] [adj] purpose | 9 |
|
