| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] used for the purpose [prep] | 10 |
|
| 2 | be used for the purpose [prep] | 10 |
|
| 3 | [be] used for the purpose [prep] | 6 |
|
| 4 | be used for the purpose [prep] | 6 |
|
| 5 | used for the purpose [prep] [v-ing] | 7 |
|
| 6 | used for the purpose [prep] [verb] | 7 |
|
