| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] a [adj] [noun pl] before | 18 |
|
| 2 | [vb pp] a [det] [noun pl] before | 13 |
|
| 3 | [vb pp] a few [noun pl] before | 13 |
|
| 4 | [vb pp] a few [noun pl] before | 13 |
|
| 5 | [vb pp] a [num] [noun pl] before | 5 |
|
| 6 | [vb pp] a [adj] years before | 5 |
|
