| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [been] [vb pp] a | 1298 |
|
| 2 | [vb pp] a [det] | 943 |
|
| 3 | [been] [vb pp] [det] | 831 |
|
| 4 | [been] a [det] | 74 |
|
