| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [been] [vb pp] a | 1298 |
|
| 2 | [pron] [vb pp] a | 985 |
|
| 3 | [pron] [been] [vb pp] | 445 |
|
| 4 | [pron] [been] a | 147 |
|
