| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | been [vb pp] [prep] a | 5754 |
|
| 2 | [vb pp] [prep] a [n mass] | 1418 |
|
| 3 | been [vb pp] [prep] [n mass] | 352 |
|
| 4 | been [vb pp] a [n mass] | 21 |
|
