| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [been] [vb pp] [art] | 2718 |
|
| 2 | to have [been] [vb pp] | 2668 |
|
| 3 | to have [vb pp] [art] | 2661 |
|
| 4 | to have [been] [art] | 819 |
|
