| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [verb] [adv] for [det] purpose | 7 |
|
| 2 | [been] [vb pp] [adv] for [det] purpose | 7 |
|
| 3 | [been] [verb] [adv] for this purpose | 5 |
|
