| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [verb] at a [adj] stage | 6 |
|
| 2 | [vb past] [verb] at an [adj] stage | 6 |
|
| 3 | [vb past] [verb] at a early stage | 6 |
|
| 4 | [vb past] [vb pp] at a [adj] stage | 5 |
|
