| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have been [vb pp] for [adj] purposes | 19 |
|
| 2 | have been [vb pp] for [adj] purpose | 18 |
|
| 3 | had been [vb pp] for [adj] purpose | 11 |
|
| 4 | have been [vb pp] for [det] purpose | 10 |
|
| 5 | have been [vb pp] for [adj] purpose | 9 |
|
| 6 | has been [vb pp] for [adj] purpose | 8 |
|
| 7 | have been used for [adj] purpose | 7 |
|
| 8 | have been [vb pp] for this purpose | 7 |
|
| 9 | have been [vb pp] for this purpose | 7 |
|
| 10 | have been [vb pp] for [adj] purpose | 6 |
|
